Mineral Book (Name) Earth Science (Period)

2 Table of Contents PA’s Common Minerals Almandine Analcime Aragonite Azurite Beryl Calcite Celestine Clinochlore Dolomite Goethite Grapite Hemimorphite Kyanite Malachite Natrolite Phlogopite Pyrite Pyrolusite Quartz Wulfenite Special Interest Minerals Cavansite Dioptase Elbaite Tobernite Smithsonite Works Cited

3 Almandine The mineral Almandine, sometimes know as almandite, is an iron aluminum silicate. Almandine is most often found in its granular form in both metamorphic and pegmatitic rock. It’s crystal form can vary from being isometric to hexoctaheral. Almandine is a non-flourescent mineral with a luster that varies between vitreous and resinous. Almandine in its coarse form is often crushed and used as an abrasive agent. Notable almandine deposits can be found in Sri Lanka, the north territory of Australia, and Alaska. Above: This is an enlarged image of almandine crystals. Below: This is a picture of the almandine sample from the Pennsylvania.

Almandine Above : This sample of Almandine was obtained from a pegmatite quarry in Delaware County, Pennsylvania. Below: This is an image of the Isometric- Hexoctahedral structure of Almandine Almandine Chemical Formula Fe 3 Al 2 (SiO 4 ) 3 Color Brown to Brownish Red, Reds, & Black to Red Black StreakWhite Hardness7 - 8 Crystal Form Isometric - Hexoctahedral LusterVitreous-Resinous FractureConchoidal GroupSilicates 4

5 Works Cited " Azurite." Glendale Community College of Arizona. Web. 17 Oct "Index of Mineral Images." Mineralogy Database. Web. 18 Oct The Mineral and Gemstone Kingdom: Home. Web. 18 Oct Mineralogy Database. Web. 16 Oct Pages, By Price. Amethyst Galleries' Mineral Gallery. Web. 18 Oct