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Willemite Calcite Fluorite Wollastonite & Rhodonite

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HAN690702

Willemite Calcite Fluorite Wollastonite & Rhodonite

Fluorescent

Description Tabs

Description
Locality: 
Garpenberg Norra, Dalarna, Sweden
Class: 
Massive/Crystalline
Size Range: 
Cabinet (10-18 cm)
Size: 
8.02 × 12.23 × 4.63 cm
Weight: 
552.00gr
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

Fluorite

Formula: 
CaF2
Strunz: 
3.AB.25
Crystal System: 
Isometric
Hardness: 
4.0
Streak: 
White
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

Wollastonite

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

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
Not Sold

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