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Ruby-Zoisite, also known as anyolite, is the natural combination of ruby and zoisite crystals in a single specimen. Zoisite, the same mineral as tanzanite, provides an earthy green color while ruby lends pink and red highlights. Ruby-zoisite is usually shaped as cabochons or carved into decorative objects.
Ruby-Zoisite was first discovered in 1954 in Tanzania. The name anyolite derives from the word for "green" in the native language of the Masai tribe.
Ruby-Zoisite has a hardness of 6.5 to 7 on the Mohs scale, and is thus of moderate hardness.
Color: Green with black and opaque ruby inclusions
Chemical composition: Ca2Al3(Sio4)3(OH) calcium aluminum silicate
Crystal system: Orthorhombic, multifaced prisms, mostly striated
Hardness: 6.5-7 (Mohs scale)
Specific gravity: 3.35
Refractive index: 1.691 - 1.700
Color of streak: White,