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Hessonite With Clinochlore

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CLB102583

Hessonite With Clinochlore

ex coll. Bersani, Milano

Description Tabs

Description
Locality: 
Liguria, Italy
Size Range: 
Cabinet (10-18 cm)
Size: 
12 × 6 × 4.5 cm
Largest Crystal: 
1.80cm
Description

I'm not sue what we've got here. Exceptional big hessonite crystals up to 1.8 cm have an etched surface. They seem to have been completely covered by calcite or another material, probably a coating of second-generation garnet? Was it etched naturally or did someone not do a good job. I'm curious if somebody has an answer to this. Still the biggest hessonite crystals I have seen so far and an interesting specimen even if I can't tell now what it might be worth. Most of the clinochlore is flattened.

Mineral Data
What's on the rock

Hessonite

Variety Of: 

Grossular

Formula: 
Ca3Al2(SiO4)3
Strunz: 
9.AD.25
Hardness: 
6.5 - 7.0
Hardness: 
0.0

Clinochlore

Formula: 
(Mg,Fe2+)5Al(AlSi3O10)(OH)8
Strunz: 
9.EC.55
Crystal System: 
Monoclinic
Hardness: 
2.0 - 2.5
Type Locality: 
Brinton's Quarry, West Chester, Westtown Township, Chester Co., Pennsylvania, USA...

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