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Vanadinite Hyalite Opal & Calcite

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CSW160942

Vanadinite Hyalite Opal & Calcite

Ex Roland Fogg Collection
Classic Locality

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Description
Locality: 
Old Yuma Mine, Saguaro National Monument, Tucson Mountains, Pima County, Arizona, United States of America
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.5 × 3.5 × 2 cm
Description

An unusual Old Yuma Mine specimen from a old collection showing matrix with one face displaying a nice coverage of prismatic red and orange vanadinite crystals in association with colourless calcite. In addition many of the vanadinite crystals show an acicular epitaxial growth of another mineral, possibly wulfenite and there are also areas of transparent bubbly hyalite opal which produces a bright green colour under short wave UV light.

Mineral Data
What's on the rock

Vanadinite

Formula: 
Pb5(VO4)3Cl
Strunz: 
8.BN.05
Crystal System: 
Hexagonal
Hardness: 
2.5 - 3.0
Type Locality: 
Zimapán, Mun. de Zimapán, Hidalgo, Mexico

Hyalite

Variety Of: 

Opal

Formula: 
SiO2·nH2O
Strunz: 
4.DA.10
Hardness: 
5.5 - 6.5
Formula: 
SiO2·nH2O
Hardness: 
5.5 - 6.5
Streak: 
white

Opal

Formula: 
SiO2·nH2O
Strunz: 
4.DA.10
Hardness: 
5.5 - 6.5
Streak: 
White

Calcite

Polymorph of: 
Aragonite and Vaterite
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

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Thank you for viewing my auctions. It goes without saying that maintaining high standards in both specimen quality and customer service are extremely important to me. If for any reason you are not happy with any aspect of your transaction then please let me know as soon as possible, ideally within 1 week of receiving your specimen. I will happily do all in my power to resolve the situation to your satisfaction. If your specimen is damaged upon delivery simply send me some photos to verify this and I'll provide you with a full refund or a replacement specimen, whichever you prefer. 

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