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Franklinite & Troostite

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FRR752458

Franklinite & Troostite

Description Tabs

Description
Locality: 
Franklin, Sussex County, New Jersey, United States of America
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.2 × 5 × 2.5 cm
Largest Crystal: 
1.50cm
Description

Specimen hosting several metallic black octahedra of Franklinite, associated with orange prisms of Troostite, from the type locality for Franklinite.

The white massive calcite around the crystals shows that the specimen has not been etched.

Minor bruise on a corner of the main Franklinite crystal.

Former Paolo Franchi collection, with label.

Mineral Data
What's on the rock

Franklinite

Formula: 
Zn2+Fe3+2O4
Strunz: 
4.BB.05
Crystal System: 
Isometric
Hardness: 
5.5 - 6.0
Colour: 
Black
Type Locality: 
Sterling Mine, Sterling Hill, Ogdensburg, Franklin Mining District, Sussex Co., New Jersey, USA

Troostite

Variety Of: 

Willemite

Formula: 
Zn2SiO4
Strunz: 
9.AA.05
Hardness: 
5.5
Formula: 
(Zn,Mn)2SiO4
Hardness: 
0.0

Seller Information

Payment options: offline, paypal_wpp, paypal_wps

Seller's terms and conditions

The item can be returned for whichever reason, provided its original conditions, and within 10 days from its delivery to the Buyer. In the case of returning, the Buyer will be entitled to the refund of the item price; shipping costs will remain at the Buyer's charge in any case.