metamorphic
Ruby in Zoisite
Anyolite
Hardness of 6.5 to 9 (due to quartz/ruby and zoisite components), vibrant green zoisite matrix with pink to red ruby inclusions and black hornblende specks, vitreous to greasy luster, monoclinic (zoisite) and trigonal (ruby) crystal systems, specific gravity around 3.3 to 3.4.
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Physical properties
Hardness of 6.5 to 9 (due to quartz/ruby and zoisite components), vibrant green zoisite matrix with pink to red ruby inclusions and black hornblende specks, vitreous to greasy luster, monoclinic (zoisite) and trigonal (ruby) crystal systems, specific gravity around 3.3 to 3.4.
Formation & geological history
Formed through metamorphic processes in high-grade regional metamorphic environments, specifically when chromium-rich solutions interact with aluminum-rich rocks under high temperature and pressure, often found in association with pegmatites.
Uses & applications
Used primarily as an ornamental stone, for carving figurines, making beads, cabochons, and as a popular collector's mineral specimen.
Geological facts
Also known as Anyolite, this distinctive rock was first discovered in 1954 near the Longido mining district in northeast Tanzania. The contrast between the red ruby and green zoisite creates a visually striking appearance.
Field identification & locations
Easily identified visually by its contrasting green and pink/red coloration. Common localities include Tanzania and India. Collectors often seek out specimens with well-defined ruby crystals within the green matrix.
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