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Willemite Calcite Wollastonite Galena & Rhodonite

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HAN690703

Willemite Calcite Wollastonite Galena & Rhodonite

Fluorescent

Description Tabs

Description
Locality: 
Garpenberg Norra, Dalarna, Sweden
Class: 
Massive/Crystalline
Size Range: 
Small cabinet (7-10 cm)
Size: 
5.17 × 8.79 × 5.3 cm
Weight: 
293.00gr
Description

Fluorescent Willemite Calcite  Fluorite and Wollastonite
Garpenberg Norra Mine - Dalarna - Sweden
Photo UV SW+LW - Green : Willemite. Red- Orange : Calcite, Orange : Wollastonite  and Fluorite : Blue - Rhodonite is pink in NL and is NF.
Willemite ia a zinc silicate mineral (Zn2SiO4) and a minor ore of zinc. It is highly fluorescent (green) under shortwave ultraviolet light. It occurs in all different colors in daylight, in fibrous masses, solid brown masses ("troostite"), and apple green gemmy masses.
It was discovered in 1830 and named after William I of the Netherlands Willemite is usually formed as an alteration of previously existing sphalerite ore bodies, and is usually associated with limestone. It is also found in marble and may be the result of a metamorphism of earlier hemimorphite or smithsonite
Artificial willemite was used as the basis of first-generation fluorescent tube phosphors. Doped with manganese-II, it fluoresces with a broad white emission band. Some versions had some of the zinc replaced with beryllium.
The deposits at Garpenberg were first worked as far back as the 13th century, making Garpenberg Sweden's oldest mine that is still operational. Complex ore that contains zinc, copper, lead, gold and silver is mined at Garpenberg, and it is this metal mix that has contributed to the area's favourable cost position.

Mineral Data
What's on the rock

Willemite

Formula: 
Zn2SiO4
Strunz: 
9.AA.05
Hardness: 
5.5
Streak: 
White
Type Locality: 
Vieille Montagne (Altenberg; Kelmisberg), Moresnet, Kelmis, Plombières-Vieille Montagne District (Plombières-Altenberg), Verviers, Liège Province, Belgium

Calcite

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

Wollastonite

Formula: 
CaSiO3
Strunz: 
9.DG.05
Hardness: 
4.5 - 5.0
Streak: 
White

Galena

Formula: 
PbS
Strunz: 
2.CD.10
Crystal System: 
Isometric
Hardness: 
2.5
Colour: 
Lead-grey
Streak: 
Lead-grey

Rhodonite

Formula: 
MnSiO3
Strunz: 
9.DK.05
Crystal System: 
Triclinic
Hardness: 
5.5 - 6.5
Streak: 
White
Type Locality: 
Kaiser Franz Mine (König Wilhelm Mine), Schävenholz (Schebenholz; Schäbenholz), Elbingerode, Harz, Saxony-Anhalt, Germany

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Priority Insured mail up to 500 grams 8 Euro
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After a sale we expect to receive the payment with Pay Pal within 48 hours. You can return the goods within 14 days of receiving them by registered priority mail with tracking number. Buyer pays the costs of the shipping and the e-Rocks listing  fees.

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