andradite

Name:

andradite (garnet)

A photo of the mineral andradite

Class:

Silicates

Chemistry:

Ca3Fe2(SiO4)3

Color(s):

yellow, brown, red-brown, black, greenish

Hardness:

6.5 - 7.0

SpecGrav:

3.6 - 4.1

Fracture:

Brittle

Cleavage:

None

Crystal:

Cubic - usually dodecahedrons or sometimes trapezohedrons.

Envronment:

occurs in granite pegmatites, in carbonatites, and in some contact metamorphics

Association:

albite, biotite, calcite, wollastonite, orthoclase, hedenbergite

Locals:

| N.J., Ca., Nv., USA | Canada | England | Geermany |

Misc:

Named for a Brazilian Mineralogist, d¹Andrada Silva. Part of the garnet family of minerals and a close cousin to grossular. The green variety is sometimes called Demantoid.

Photos
& Locals:

1.) Alpine Mine. Nightingale Dist., Pershing Co., Nevada
2.) Alpine Mine. Nightingale Dist., Pershing Co., Nevada

3.) Alpine Mine. Nightingale Dist., Pershing Co., Nevada

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Name:	andradite (garnet)
Class:	Silicates
Chemistry:	Ca3Fe2(SiO4)3
Color(s):	yellow, brown, red-brown, black, greenish
Hardness:	6.5 - 7.0	SpecGrav:	3.6 - 4.1
Fracture:	Brittle	Cleavage:	None
Crystal:	Cubic - usually dodecahedrons or sometimes trapezohedrons.
Envronment:	occurs in granite pegmatites, in carbonatites, and in some contact metamorphics
Association:	albite, biotite, calcite, wollastonite, orthoclase, hedenbergite
Locals:	\| N.J., Ca., Nv., USA \| Canada \| England \| Geermany \|
Misc:	Named for a Brazilian Mineralogist, d¹Andrada Silva. Part of the garnet family of minerals and a close cousin to grossular. The green variety is sometimes called Demantoid.

	Photos & Locals:
		1.) Alpine Mine. Nightingale Dist., Pershing Co., Nevada 2.) Alpine Mine. Nightingale Dist., Pershing Co., Nevada		3.) Alpine Mine. Nightingale Dist., Pershing Co., Nevada

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