Pyrope
Gemstone
>
The mineral pyrope is a member of the garnet group. Pyrope is the only member of the garnet family to always display red colouration in natural samples, and it is from this characteristic that it gets its name: from the Greek words for fire and... Wikipedia
Color: Red
Chemical formula: Mg₃Al₂Si₃O₁₂
Hardness (Mohs hardness scale): 7 – 7.5
Refractive index: 1.72 – 1.76
Crystal class: Hexoctahedral (m3m); H–M symbol: (4/m 3 2/m)
Crystal system: Cubic
Formula (repeating unit): Mg3Al2(SiO4)3