{"id":3241,"date":"2013-03-25T15:32:20","date_gmt":"2013-03-25T21:32:20","guid":{"rendered":"http:\/\/sanuja.com\/blog\/?p=3241"},"modified":"2013-04-13T13:50:52","modified_gmt":"2013-04-13T19:50:52","slug":"minerals-from-glgy311-lab","status":"publish","type":"post","link":"https:\/\/sanuja.com\/blog\/minerals-from-glgy311-lab","title":{"rendered":"Minerals and rocks from GLGY311 Lab"},"content":{"rendered":"

Warning!<\/strong><\/p>The descriptions of minerals may not be correct. I am in the process of completely deleting the texts. Thank you.<\/div>\n

A better images of minerals can be found here<\/a><\/h3>\n

The following images are taken from a Samsung S III phone (Yes, you can’t believe the quality of detail on these images came from a 8 pix camera; contact me for technical\/electronics detail on that) during the lab periods for Geology 311 (Mineralogy and Rocks) Winter 2013 at the University of Calgary.

\"Beautiful
Beautiful example of dolomite habit.<\/figcaption><\/figure><\/p>\n

Please click on the image<\/b> on the left to access the larger original file.
Download the PDF Version here<\/a><\/strong>.<\/h3>\n

Igneous and Precipitate Minerals and Rocks<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Sample<\/b><\/td>\nProperties<\/b><\/td>\n<\/tr>\n
\"min311btxpl\"<\/a>
\"min311btxpl2\"<\/a>
\"min311btxplh\"<\/a>
\"min311biotite\"<\/a>
\"min311biotite\"<\/a><\/td>\n		\n

Biotite<\/strong><\/font><\/p>\n

Chem: K(Fe,Mg)3<\/sub>AlSi3<\/sub>O10<\/sub>(OH)2<\/sub>
Type: Sheet \/ Phyllosiclicate
Structure: T-O-T+c structure
Comp. Anio: (Si4<\/sub>O10<\/sub>)4-<\/sup>
Si-to-O: 2 ; 5
Cry. sys: Monoclinic
Hd: 2.5 \/ 3.0
Hs: shiny black
Col\/pleo: tan\/straw brown \u2013 dark brown or green – brown green
Relief: moderate\/+ve
Cleve: perfect cleavage
Twin: none
Habit: massive\/platy
Ext: parallel \/ pebbly
Int. col: 3rd \u2013 4th
Other: vitrous<\/td>\n<\/tr>\n

\"min311calppl\"<\/a>
\"min311calxpl\"<\/a>\"min311calcite\"<\/a><\/td>\n		\n

Calcite<\/strong><\/font><\/p>\n

Chem: CaCO3<\/sub>
Type: rhombohedral \/ trigonal
Hd: 3
Hs: Colourless, white, grey colourless, maybe dirty
Relief: high\/positive
Cleve: brittle \/ concoidal black with pastel stripes
Twin: wiggly twins?!?
Habit: crystalline\/granular
Ext: twinkling extinction
Int. Col: VERY HIGH \u2013 4th order
Other: reacts readily with HCl<\/td>\n<\/tr>\n

\"min311chromitexpl\"<\/a><\/td>\n\n

Chromite (alt)<\/strong><\/font><\/p>\n

Chem: FeCr2<\/sub>O4<\/sub>
Hs: brown streak, metallic luster, black granular
Other: black under both xpl and ppl<\/td>\n<\/tr>\n

\"min311grtppl\"<\/a>
\"min311grtxpl\"<\/a><\/td>\n		\n

Garnet<\/strong><\/font><\/p>\n

(Ca,Fe,Mg,Mn)3Al2Si3O12
Orthosilicate \/ Nesosilicate
T-O structure
Comp. An: SiO4<\/sub>4-<\/sup>
Si-to-O: 1 ; 4
Type: isometric \/ cubic
Hd: 6.5 – 7
Hs: red but variety too
Col\/pleo: clear\/dirty – none
Relief: high\/positive
Twin: none\/uneven
Habit: blocky\/cubic
Ext: NA<\/td>\n<\/tr>\n

\"min311hblxpl\"<\/a>
\"Lick<\/a>
\"Lick<\/a>
\"min311hblppl\"<\/a>
\"Lick<\/a>
\"min311hblxpl2\"<\/a>
\"min311hbppl2\"<\/a>
\"min311rockWhbl\"<\/a><\/td>\n		\n

Hornblende(type of amp)<\/strong><\/font><\/p>\n

Chem: Ca2<\/sub>(Mg,Fe,Al)5<\/sub>(Al,Si)8<\/sub>O22<\/sub>(OH)2<\/sub>
Type: Double Chain \/ Insolcate
Structure: T-O-T structure
Comp. Anio: (Si4<\/sub>O11<\/sub>)6-<\/sup>
Si-to-O: 4 ; 11
Cry. sys: Monoclinic
Hd: 5.0 – 6.0
Hs: shiny black – underlaying green?
Col\/pleo: green-brown\/light-darker
Relief: high\/positive
Cleve: brittle – 2@60\/120
Twin: simple twins (sometimes)
Habit: bladed \/ fibrous
Ext: inclined (14-25)
Int. col: 2nd low – 3rd high?
Other: dark opaque rim<\/p>\n<\/td>\n<\/tr>\n

\"min311kfelppl\"<\/a>
\"min311kfelxpl\"<\/a>
\"Under<\/a>
\"min311kfelxpl2\"<\/a>
\"min311granite\"<\/a><\/td>\n		\n

K-Feldspar
(Orthoclase)<\/strong><\/font><\/p>\n

Chem: KAlSi3O8
Type: Framework \/ Tectosilicate
Comp. Anio: SiO2<\/sub>
Si-to-O: 1;2
Cry: Monoclinic
Hd: 6
Col\/pleo: perthitic texture in pink-white
Relief: very low\/-ve\t
Clev: 2@90
Twin: tarten\/carlsbad
Habit: tabular
Int. col: 1st \u2013 grey\/white<\/td>\n<\/tr>\n

\"min311olvxpl\"<\/a>
\"min311olvxpl2\"<\/a>
\"min311olvxplext\"<\/a>
\"min311olvppl\"<\/a>
\"min311olv_px_chrmxpl\"<\/a>
\"min311olv_px_chrmppl\"<\/a>
\"min311olv_thin\"<\/a>
\"min311olivine\"<\/a><\/td>\n		\n

Olivine<\/font><\/strong><\/p>\n

Chem: (Fe,Mg)SiO4<\/sub>
Type: Orthosilicate \/ Nesosilicate
Comp. Anio: SiO4<\/sub>4-<\/sup>
Si-to-O: 1 ; 4
Cry. sys: orthorhombic
Hd: 6.5 \u2013 7
Hs: yellow-green\/olive green
Col\/pleo: colourless-olive green\/none
Relief: high\/positive
Cleve: none\/irregular
Habit: granular
Ext. parallel to crystal faces
Int. col: 2nd \u2013 4th
Other: rarely with quartz<\/td>\n<\/tr>\n

\"min311orthoxpl\"<\/a>
\"min311orthoxplExt\"<\/a><\/td>\n		\n

Orthopyroxene<\/strong><\/font><\/p>\n

Chem:(Fe,Mg)2Si2O6
Type: Single Chain \/ Inosilcate
TOT: T-O-T structure
Comp. An: (SiO3)2-
Si-O: 1 ; 3
orthorhombic
Hd: 5.0 \u2013 7
shiny black \u2013 dull
weathered black\tpale green \u2013 pink
Relief: moderate\/+ve
Cleve: 2@90
Habit: thin lamellar tabular\tparallel
Int. Col.: 2nd \u2013 brown\/yellow<\/td>\n<\/tr>\n

\"min311plg2\"<\/a>
\"min311plg\"<\/a>
\"min311plgxpl_zone\"<\/a>
\"thin<\/a><\/td>\n		\n

Plagioclase<\/font><\/strong><\/p>\n

Chem: (Ca,Na)AlSi3<\/sub>O8<\/sub>
Type: Framework \/ Tectosilicate
Comp. anio: SiO2<\/sub>
Si-to-O: 1 ; 2
Cry. sys: Triclinic
Hd: 6 – 6.5
Hs: grey – white
Col\/pleo: clear\/dirty
Relief: low\/-ve
Cleve: 2@90
Twin: albite\/carlsbad\/zone
Habit: tabular
Int. col: 1st – grey\/white
Other: zoning – Na rich rim \/ Ca rich core
NOTE zoning in the last petrographic image.<\/p>\n<\/td>\n<\/tr>\n

\"min311qtppl\"<\/a>
\"min311qtppl2\"<\/a>
\"Taken<\/a>
\"min311qtpplcry\"<\/a>\"min311quartz\"<\/a>
\"min311quartz2\"<\/a><\/td>\n		\n

Quartz<\/font><\/strong><\/p>\n

Chem: SiO2<\/sub>
Type: Framework \/ Tectosilicate
Comp. Anio: SiO2<\/sub>
Si-to-O: 1 ; 2
Cry. sys: rhombohedral \/ trigonal
Hd: 7
Hs: many colours
Col\/pleo: translucide clear\/none
Relief: low\/negative
Cleve: none\/concoidal
Twin: none
Habit: massive\/colmnar
Ext. wavy
Int. col: 1st \u2013 grey\/white<\/td>\n<\/tr>\n

\"min311tourmaline\"<\/a><\/p>\n

\"min311tourmaline2\"<\/a><\/td>\n

\n

Tourmaline<\/strong><\/font><\/p>\n<\/td>\n<\/tr>\n<\/table>\n

<\/p>\n

Metamorphic\/Sedimentary Minerals and Rocks<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Sample<\/b><\/td>\nProperties<\/b><\/td>\n<\/tr>\n
\"min311actinolite\"<\/a><\/td>\n\n

Actinolite<\/strong><\/font><\/p>\n

Chem: Ca2<\/sub>(Mg,Fe)5<\/sub>Si8<\/sub>O22<\/sub>(OH)2<\/sub>
Inosilicate
Monoclinic
moderate\/+ve
green under PPL<\/p>\n<\/td>\n<\/tr>\n

\"311andalusiteppl\"<\/a>
\"311andalusitexpl\"<\/a>
\"311andalusitexpl2\"<\/a>
\"min311andalusite\"<\/a>
\"min311andalusite2\"<\/a><\/td>\n		\n

Andalusite<\/strong><\/font><\/p>\n

Chem: Al2<\/sub>SiO5<\/sub>
Orthosilicate \/ Nesosilicate
orthorhombic
7-7.5
red? Dark cross-like in x-section = chiasolite
Col\/pleo:\tclear\/dirty – darker than Cordierite in ppl
Relief: moderate\/+ve
Ext: parallel
Int. Col: 1st – grey
Other: looks like a dirtier Cordierite, higher relief LOW PRESSURE POLYMORPH<\/p>\n<\/td>\n<\/tr>\n

\"311_341bedding_cleavage\"<\/a><\/td>\n\n

Bedding vs Cleavage<\/strong><\/font><\/p>\n

To be updated…<\/p>\n<\/td>\n<\/tr>\n

TBA<\/td>\n\n

Blueschist<\/strong><\/font><\/p>\n

This rock is formed deep underground about ~15 to 30 km of depth with between ~200 to 500 degrees Celsius. Blue colour is caused by Glaucophane mineral in the rock, which is a type of amphibole.<\/p>\n<\/td>\n<\/tr>\n

\"min311chertppl\"<\/a>
\"min311chertxpl\"<\/a>
\"min311chert\"<\/a><\/td>\n		\n

Chert<\/strong><\/font><\/p>\n

Chem: SiO2<\/sub>
Hd: 7
Hs: black, grey, white
Col\/pleo: dirty brownish grains – none
Relief: low\/-ve
Cleve: none\/concoidal
Habit: nodules
Int. col: 1st – grey\/white
Notes: not a true mineral rather a siliceous ooze – fine crystalline in xpl. Hardness same as quartz<\/p>\n<\/td>\n<\/tr>\n

\"min311chalcedonyqt\"<\/a><\/td>\n\n

Chalcedony and cavity filled with quartz<\/strong><\/font><\/p>\n

Chalcedony is a type of fibrous cryptocrystalline to fine grained silica that forms in pores, cavities and vugs in pre-existing rocks by precipitation from Si-rich fluids that pass through the rocks. Agate is a more brightly coloured variety of chalcedony that typically shows colour banding, with the colours being due to trace amounts of iron and manganese (or, increasingly, to dyes!). The concentrically banded geodes that you see in rock shops are vugs that have been partially to wholly filled with chalcedony\/agate.\n<\/p>\n<\/td>\n<\/tr>\n

\"min311chloriteppl\"<\/a>
\"min311chloritexpl\"<\/a><\/td>\n		\n

Chlorite<\/strong><\/font><\/p>\n

Chem: (Mg,Fe)3<\/sub>(Si,Al)4<\/sub>O10<\/sub>(OH)2*(Mg,Fe)3<\/sub>(OH)6<\/sub>
Sheet \/ Phyllosillicate
T-O-T structure
Monoclinic
Hd: 2-2.5
Hs: green clear \u2013 green
Relief: high\/positive
Cleve: perfect cleavage\t foliated masses\t–\t2nd \u2013 Berlin Blue
Other: has inclusions<\/p>\n<\/td>\n<\/tr>\n

\"311coal\"<\/a><\/td>\n\n

Coal<\/strong><\/font><\/p>\n

To be updated…<\/p>\n<\/td>\n<\/tr>\n

\"min311dolomiternx\"<\/a><\/td>\n\n

Dolomite<\/strong><\/font><\/p>\n

\tCaMg(CO3)2<\/sub>
rhombohedral \/ trigonal
Hd: 3.5 – 4
Hs: Colourless, white, grey (due to impurities, it can be many colours)
Col\/pleo: colourless\/none
Relief: low-moderate
Cleve: perfect
Twin: black with pastel stripes, wiggly twins?!?
Habit: crystalline\/granular
Ext: twinkling extinction
Int. Col: VERY HIGH – 4th order
Other:\tSugary texture may only be observed in finely crystalline dolomite as opposed to curved crystals faces of coarse dolomite. HCL reaction is very poor to none. It is extremely difficult to separate dolomite from calcite using a thin section. Precipitate mineral!<\/p>\n<\/td>\n<\/tr>\n

\"min311epidote\"<\/a>
\"min311epidote2\"<\/a>
\"min311epidote3\"<\/a><\/td>\n		\n

Epidote<\/strong><\/font><\/p>\n

Chem: FeAl2<\/sub>O-OH[Si2<\/sub>O7<\/sub>][SiO4<\/sub>]
Sorosilicate
Monoclinic
6
silver\/pistachio green\tyellow or green
colourless to greenish yellow\t
Relif: high\/+ve
brittle – planar
lamellar (not common)\tfibrous, coarse to fine granular, massive.
3rd – bright green\tvitrous,
Notes: pearly (Regional and contact metamorphic rocks)<\/p>\n<\/td>\n<\/tr>\n

\"311_341pressure_shadow\"<\/a><\/td>\n\n

Garnet with pressure shadows<\/strong><\/font><\/p>\n

Please check the information for the mineral in the igneous table above.<\/p>\n<\/td>\n<\/tr>\n

\"min311he-qtppl\"<\/a>
\"min311he-qtxpl\"<\/a>
\"min311he-qt\"<\/a><\/td>\n		\n

Hematite (Ore) (B), Quartz (A)<\/strong><\/font><\/p>\n

On the XPL photo, you can see the radiating cement of quartz (A) and the think black-brown (to dark reddish) outline of hematite (B) Hs: red-brown streak, steel gray and metallic shiny<\/p>\n<\/td>\n<\/tr>\n

\"min311kyaniteppl\"<\/a>
\"min311kyaniteppl2\"<\/a>
\"min311kyanitexpl\"<\/a>
\"min311kyanitexpl2\"<\/a>
\"min311kyanitexpl3\"<\/a>
\"311kyanite\"<\/a>
\"min311kyanite2\"<\/a>
\"min311kyanite3\"<\/a>
\"min311kyanite4\"<\/a><\/td>\n		\n

Kyanite<\/strong><\/font><\/p>\n<\/p>\n

Chem: Al2<\/sub>SiO5<\/sub>
Type: Triclinic
Hd: 5.5-7
Hs: blue
Col\/pleo: clear
Relief: high\/+ve
Twin: simple twins (sometimes)
Habit: bladed \/ tabular
Ext: inclined
Int. Col: 1st – grey\/yellow
Other: HIGH PRESSURE POLYMORPH, may show stepped appearance like “tree-bark” in thinsection<\/td>\n<\/tr>\n

\"min311mudstoneIntmudppl\"<\/a>
\"min311mudstoneIntmudxpl\"<\/a>
\"min311mudstoneIntmud\"<\/a>
\"min311mudstoneclappl\"<\/a>
\"min311mudstoneclaxpl\"<\/a>
\"min311mudstonecla\"<\/a><\/td>\n		\n

Mudstone<\/strong><\/font><\/p>\n

with mud interclasts<\/p>\n

AND<\/p>\n

with interclasts of fragments<\/p>\n<\/td>\n<\/tr>\n

\"min311muscoppl\"<\/a>
\"min311muscoxpl1\"<\/a>
\"min311muscoxpl2\"<\/a><\/td>\n		\n

Muscovite<\/strong><\/font><\/p>\n

Chem: KAl3Si3O10(OH)2
Sheet \/ Phyllosilicate
T-O-T+c structure
Comp. An: (Si4O10)4-
2 ; 5
Monoclinic
Hd: 2.5 \/ 4.0
Hs: silvery\/white – colourless
Col\/pleo: clear\/none
Relief: moderate\/+ve
Cleave: perfect cleavage
Twin: none
Habit:massive\/platy\tparallel \/ pebbly\t2nd – 3rd\tvitrous<\/p>\n<\/td>\n<\/tr>\n

\"min311oolithsppl\"<\/a>
\"min311oolithsStylolitesxpl\"<\/a><\/td>\n		\n

Ooids<\/strong><\/font><\/p>\n

The second image (XPL) shows with stylolites…<\/p>\n<\/td>\n<\/tr>\n

\"min311fosppl\"<\/a>
\"min311fosxpl\"<\/a><\/td>\n		\n

Fossils in Packstone<\/strong><\/font><\/p>\n

to be updated…<\/p>\n<\/td>\n<\/tr>\n

\"311serprx\"<\/a><\/td>\n\n

Serpentine<\/strong><\/font><\/p>\n

to be updated…<\/p>\n<\/td>\n<\/tr>\n

\"min311silxpl\"<\/a>
\"min311silppl\"<\/a>
\"min311silppl1\"<\/a>
\"min311silppl2\"<\/a>
\"min311silxpl2\"<\/a>
\"min311silxpl3\"<\/a><\/td>\n		\n

Sillimanite<\/strong><\/font><\/p>\n

First two images are from an altered formation of the mineral in igneous rocks.<\/p>\n

Chem:\tAl2SiO5
orthorhombic
Hd: 7.5
Hs: white\/yellow
Col\/pleo: clear\/none
Relief: moderate to high\/+ve
Habit: cylindrical\/fibrous
Int. col: 2nd – pink<\/p>\n<\/td>\n<\/tr>\n

\"min311stauroppl\"<\/a>
\"min311stauroppl1\"<\/a>
\"min311stauroxpl3\"<\/a>
\"min311stauroxpl1\"<\/a>
\"min311stauroxpl2\"<\/a>
\"min311stauroxpl3\"<\/a>
\"min311staurolite1\"<\/a>\"min311staurolite2\"<\/a><\/td>\n		\n

Staurolite<\/strong><\/font><\/p>\n

Chem: (Fe,Mg,Zn)2<\/sub>Al9<\/sub>(Si,Al)4<\/sub>O2<\/sub>0(OH)4<\/sub>
Type: Orthosilicate \/ Nesosilicate
\t\tMonoclinic
Hd: 7-7.5
Hs: dark brown \/ black
Col\/pleo: honey\/potato yellow – none (ppl)
Relief: high\/+ve
Cleve: subconcoidal
Ext: zoning?
Habit: intersecting prisms like a cross
Int. Col: 2nd – mid\/high yellow
Other: poikiloblastic (air bubbles), “stauros” greek for cross – 2intersecting prisms HEXAGONAL SHAPED EUHEDRAL<\/p>\n<\/p>\n<\/td>\n<\/tr>\n

\"min311tremolite\"<\/a>
\"min311tremolite2\"<\/a><\/td>\n		\n

Tremolite<\/strong><\/font><\/p>\n

Monoclinic
5.0-6.0
white, brown…
colourless – none\t
moderate\/+ve
brittle
2@60\/120
silky, fibrous
2nd – bright
turquoise\tsimilar to sillimanite in handsample<\/p>\n<\/td>\n<\/tr>\n

\"311zebradolrx\"<\/a><\/td>\n\n

Zebra Dolostone<\/strong><\/font><\/p>\n

This type of rocks were originally limestone, now transformed into \u2018Zebra\u2019 dolomite.<\/p>\n

At least partially fracture controlled, because of planar zones of coarse, light-coloured dolomite in darker, fine grained host. However, all of the rock now consists of dolomite, including the dark fine grained portions, suggesting an earlier period of pervasive dolomitization. <\/p>\n<\/td>\n<\/tr>\n

\"311hailGyp\"<\/a>
\"min311hailGyp2\"<\/a><\/td>\n		\n

Halite and Gypsum<\/strong><\/font><\/p>\n

Halite is a Precipitate! Since it is white in colour, hand samples may be contaminated with other minerals causing it to appear in different coulours. The Halite is pretty much table salt, but do not taste it.<\/p>\n

Gypsum has a sugary texture, curved crystal surfaces<\/p>\n<\/td>\n<\/tr>\n<\/table>\n

To be updated…
\nGlass<\/b>
\n\"311_rx_ObsidianGlass\"<\/a>\"311_rx_ObsidianGlass_2\"<\/a><\/p>\n

List of Minerals Properties To Be Updated<\/h3>\n

Please read what PPL and XPL<\/a>.<\/p>\n

Clinopyroxene<\/b>\tCa(Fe,Mg)Si2O6\tSingle Chain \/ Inosilcate\tT-O-T structure\t(SiO3)2-\t1 ; 3\tMonoclinic\t5.0 – 7\tshiny black – dull weathered black\tearthy\/brown – nonpleochroic\tmoderate\/+ve\t2@90\tsometimes carlsbad \/ zoning\tthin lamellar tabular\tinclined (35-48)\t2nd – low\/mid<\/p>\n

Apatite<\/b>\tCa5(PO4)3(F,Cl,OH)\t–\t–\t–\t–\tHexagonal\t5\tvery small usually – never see\tclear\/none\thigh\/positive\tnone\/concoidal\tnone\tsix sided euhedral\t–\t1st – grey\/white\tusually a captured\/ looks standing up\u2026 looks like quartz but really small<\/p>\n

Tourmaline<\/b>\tNa(Fe,Mg)3Al6(BO3)3(Si6O18)(OH)4\tRing \/ Cyclosilicate\t–\tSi6O1812-\t1 ; 3\trhombohedral \/ trigonal\t7\tblack hexagonal prisms seen in class?\tvariable – variable\tmoderate\/+ve\tnone\tnone\tstriated prism\tparallel\t1st – 2nd – moderate<\/p>\n

Cordierite<\/b>\tAl2SiO5\tRing \/ Cyclosilicate\t\t\t\torthorhombic\t7-7.5\t\tclear\/dirty – lighter than Andalusite, has border\tmoderate\/+ve\tsubconcoidal\tsector twinning\t\t\t1st – grey\/white\tlooks like a cleaner andalusite, has patchy domains that extinct at different angles within crystal, has sometimes brown outlined border around crystal<\/p>\n

Glaucophane<\/b>\t\tDouble Chain \/ Insolcate\t\t\t\tMonoclinic\t5.0 – 6.0\tgrey\/lavender blue\tlavender blue to striking blue (ppl)\t\t\t\tbladed \/ fibrous\t\t3rd – bright blue<\/p>\n

titanite<\/b>\t\t\t\t\t\t\t\tpale brown – none\tv. high\/ +ve<\/p>\n

phlogopite<\/b><\/p>\n

lawsonite<\/b>\t\t\t\t\t\t\t\tmod. High relief<\/p>\n

—OLD DATA–<\/p>\n

Staurolite:<\/b> pleochroic (light -dark yellow), cruciform,+<\/p>\n

Andalusite:<\/b> 2 @ 90, inclusion of other minerals, high relief, cloudy in PPL.<\/p>\n

Cordierite:<\/b> blobby\/blocky, low interference, other minerals inclusion. And\/cord look like quartz.<\/p>\n

Silimanite:<\/b> hand elongated, white bladed, thin pleochroic (yellow-orange), second order, high relief.<\/p>\n

Chlorite:<\/b> green under PPL. Purple\/brown under XPL.<\/p>\n

Clinopyroxene:<\/b> higher birefringence and non-parallel extinction.<\/p>\n

Epidote:<\/b> “stain glass” yellow-green-blue under XPL. hand s vitreous.<\/p>\n

Glaucophane:<\/b> blue amphibole found in blueschists.<\/p>\n

Tremolite:<\/b> white in PPL, found in calcitic rocks only.<\/p>\n","protected":false},"excerpt":{"rendered":"

A better images of minerals can be found here The following images are taken from a Samsung S III phone (Yes, you can’t believe the quality of detail on these images came from a 8 pix camera; contact me for technical\/electronics detail on that) during the lab periods for Geology 311 (Mineralogy and Rocks) Winter … Continue reading Minerals and rocks from GLGY311 Lab<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":3834,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[17],"tags":[8,23],"class_list":["post-3241","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-earth-science","tag-academic","tag-geology"],"jetpack_featured_media_url":"https:\/\/sanuja.com\/blog\/wp-content\/uploads\/2013\/02\/min311dolomiternx.jpg","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/posts\/3241","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/comments?post=3241"}],"version-history":[{"count":0,"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/posts\/3241\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/media\/3834"}],"wp:attachment":[{"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/media?parent=3241"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/categories?post=3241"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/tags?post=3241"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}