Difference between revisions of "Pyrope"

Latest revision as of 13:30, 20 December 2022

Pyrope

Pyrope crystal
Image credit: RRUFF

Description

A transparent, ruby-red Garnet composed of magnesium aluminum silicate where the magnesium is partially replaced with calcium and iron. The color of pyrope ranges from a deep red to almost black. Gemstone quality pyropes are mined in the Czech Republic, South Africa, and Australia.

Synonyms and Related Terms

Infrared spectrum of Pyrope
Image credit: RRUFF

Raman spectrum of pyrope
Image credit: RRUFF

garnet; Cape ruby; Arizona ruby; California ruby; Bohemian ruby; rhodolite (violet); piropo (Esp., Port.); Pyrop (Deut.); pyroop (Ned.)

Physical and Chemical Properties

Fracture = conchoidal
Luster = vitreous to resinous
Streak = colorless to white
Birefringence = isotropic
Pleochroism = none
UV fluorescence = inert
Composition = 3MgO-Al2O3-3SiO2
Mohs Hardness = 7.0 - 7.5
Density = 3.78 g/ml
Refractive Index = 1.714-1.742

Comparisons

Properties of Common Gemstones

Resources and Citations

Gem Identification Lab Manual, Gemological Institute of America, 2016.
Mineralogy Database: Pyrope
G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 354
Jack Odgen, Jewellery of the Ancient World, Rizzoli International Publications Inc., New York City, 1982
Encyclopedia Britannica, http://www.britannica.com Comment: "pyrope." Accessed 14 Sept. 2001 .
C.W.Chesterman, K.E.Lowe, Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf, New York, 1979
Wikipedia: http://en.wikipedia.org/wiki/Pyrope (Accessed Sept. 14, 2005)
The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998

@@ Line 1: / Line 1: @@
 [[File:pp30290pyrope.jpg|thumb|Pyrope]]
+[[File:Pyrope R050112 Sample Photo 23436 M.jpg|thumb|Pyrope crystal<br> Image credit: [https://rruff.info/pyrope/display=default/R050112 RRUFF]]]
 == Description ==
-A transparent, ruby-red [http://cameo.mfa.org/materials/fullrecord.asp?name=garnet garnet] composed of magnesium aluminum silicate where the magnesium is partially replaced with calcium and iron. The color of pyrope ranges from a deep red to almost black. Gemstone quality pyropes are mined in the Czech Republic, South Africa, and Australia.
+A transparent, ruby-red [[garnet|garnet]] composed of magnesium aluminum silicate where the magnesium is partially replaced with calcium and iron. The color of pyrope ranges from a deep red to almost black. Gemstone quality pyropes are mined in the Czech Republic, South Africa, and Australia.
 == Synonyms and Related Terms ==
+[[File:Pyrope IR-ATR R040159.png|thumb|Infrared spectrum of Pyrope<br>Image credit: [https://rruff.info/pyrope/display=default/R040159 RRUFF]]]
+[[File:Pyrope raman RRUFF R040159.png|thumb|Raman spectrum of pyrope<br>Image credit: [https://rruff.info/pyrope/display=default/R040159 RRUFF]]]
+garnet; Cape ruby; Arizona ruby;  California ruby; Bohemian ruby; rhodolite (violet); piropo (Esp., Port.); Pyrop (Deut.); pyroop (Ned.)
-garnet; Cape ruby; Bohemian garnet; rhodolite (violet); piropo (Esp., Port.); Pyrop (Deut.); pyroop (Ned.)
+==Physical and Chemical Properties==
-[[[SliderGallery rightalign|pyrope.jpg~Raman]]]
+* Fracture = conchoidal
+* Luster = vitreous to resinous
-== Other Properties ==
+* Streak = colorless to white
+* Birefringence = isotropic
-Fracture = conchoidal.  Luster = vitreous to resinous.  Streak = colorless to white.  Birefringence = isotropic.  Pleochroism = none.  UV fluorescence = inert.
+* Pleochroism = none
+* UV fluorescence = inert
-{| class="wikitable"
+* Composition = 3MgO-Al2O3-3SiO2
-|-
+* Mohs Hardness = 7.0 - 7.5
-! scope="row"| Composition
+* Density = 3.78 g/ml
-| 3MgO-Al2O3-3SiO2
+* Refractive Index = 1.714-1.742
-|-
-! scope="row"| Mohs Hardness
-| 7.0 - 7.5
-|-
-! scope="row"| Density
-| 3.78
-|-
-! scope="row"| Refractive Index
-| 1.714-1.742
-|}
-== Additional Information ==
-Mineralogy Database: [http://www.webmineral.com/data/Pyrope.shtml Pyrope]
 == Comparisons ==
@@ Line 37: / Line 27: @@
 [[media:download_file_458.pdf|Properties of Common Gemstones]]
+==Resources and Citations==
+* Gem Identification Lab Manual, Gemological Institute of America, 2016.
-== Authority ==
+* Mineralogy Database: [http://www.webmineral.com/data/Pyrope.shtml Pyrope]
+* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971  Comment: p. 354
-* G.S.Brady, G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971  Comment: p. 354
+* Jack Odgen, ''Jewellery of the Ancient World'', Rizzoli International Publications Inc., New York City, 1982
+* ''Encyclopedia Britannica'', http://www.britannica.com  Comment: "pyrope." Accessed 14 Sept. 2001 .
-* Jack Odgen, Jack Odgen, ''Jewellery of the Ancient World'', Rizzoli International Publications Inc., New York City, 1982
+* C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 1979
+* Wikipedia: http://en.wikipedia.org/wiki/Pyrope (Accessed Sept. 14, 2005)
-* ''Encyclopedia Britannica'', http://www.britannica.com  Comment: "pyrope." Encyclopdia Britannica. 14 Sept. 2001 .
-* C.W.Chesterman, K.E.Lowe, C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 1979
-* Wikipedia, the free encyclopedia, at http://www.wikipedia.com  Comment: http://en.wikipedia.org/wiki/Pyrope (Accessed Sept. 14, 2005)
 * ''The American Heritage Dictionary'' or ''Encarta'', via Microsoft Bookshelf 98, Microsoft Corp., 1998