Collectible minerals - full range in stock "Garnet"

Garnets are a group of minerals.
The main representatives of the garnet series:

        Pyrope Mg3Al2[SiO4]3 — Dark red color. It is found in ultramafic rocks rich in magnesium and their degradation products. Characteristic for diamond-bearing rocks of South Africa and Yakutia.
       Almandine Fe2+3Al2[SiO4]3 — Color red, brown, violet. The most common of the pomegranates. Common in crystalline schists and gneisses.
       Spessartine Mn3Al2[SiO4]3 — Color pink, red, yellowish-brown. It occurs in pegmatites and crystalline schists.
         Grossular Ca3Al2[SiO4]3 — Color light green (tsavorite) or greenish-brown. Characteristic of skarns.
        Andradite Ca3Fe3+2[SiO4]3 — Color yellow (topazolite), brown, red, greenish-brown. It is also found in skarns, less often in shales and other rocks.
         Demantoid - a transparent variety of green andradite (1.5% Cr2O3) is a precious stone.
         Melanite is black in color and contains TiO2.
       Uvarovite Ca3Cr2[SiO4]3 — Emerald green color. Forms finely crystalline crusts in chromite. Rare.

Изоморфные ряды граната наглядно

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Physical properties of Garnet

General
Category	Nesosilicate
Formula (repeating unit)	The general formula X₃Y₂(SiO₄)₃
IMA symbol	Grt
Crystal system	Isometric
Crystal class	${displaystyle 4/m{ar {3}}2/m}$
Space group	Ia3d
Identification
Color	virtually all colors, blue is very rare
Crystal habit	Rhombic dodecahedron or cubic
Cleavage	Indistinct
Fracture	conchoidal to uneven
Mohs scale hardness	6.5–7.5
Luster	vitreous to resinous
Streak	White
Specific gravity	3.1–4.3
Polish luster	vitreous to subadamantine
Optical properties	Single refractive, often anomalous double refractive
Refractive index	1.72–1.94
Birefringence	None
Pleochroism	None
Ultraviolet fluorescence	variable
Other characteristics	variable magnetic attraction
Major varieties
Pyrope	Mg₃Al₂Si₃O₁₂
Almandine	Fe₃Al₂Si₃O₁₂
Spessartine	Mn₃Al₂Si₃O₁₂
Andradite	Ca₃Fe₂Si₃O₁₂
Grossular	Ca₃Al₂Si₃O₁₂
Uvarovite	Ca₃Cr₂Si₃O₁₂