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Hulsite & Vesuvianite

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BCK754327

Hulsite & Vesuvianite

Type Locality

Description Tabs

Description
Locality: 
Brooks Mountain, Seward Peninsula, Nome Borough, Alaska, United States of America
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2.2 × 1.3 × 1.8 cm
Description

You are bidding on two small samples, which are both sides of the same etched vug, that have large, stepped crystals of rare hulsite with numerous small, sharp dark green vesuvianite crystals. 

Mineral Data
What's on the rock

Hulsite

Formula: 
(Fe2+,Mg)2(Fe3+,Sn)(BO3)O2
Strunz: 
6.AB.45
Hardness: 
3.0
Colour: 
Black
Type Locality: 
Brooks Mountain, Seward Peninsula, Nome Borough, Alaska, USA

Vesuvianite

Formula: 
(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Strunz: 
9.BG.35
Hardness: 
6.5
Streak: 
White
Type Locality: 
Monte Somma, Somma-Vesuvius Complex, Naples Province, Campania, Italy

Seller Information

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