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Helvine

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JYJ1160631

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Description
Locality: 
Hørtekollen, Sylling, Lier, Viken, Norway
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 2 × 2 cm
Description

Well-crystallized helvine on matrix from the classic Hørtekollen locality near Sylling, Lier, Viken, Norway. The specimen features brown to honey-brown helvine crystals with a vitreous luster, embedded in contrasting host rock. The crystals show good definition and typical tetrahedral to complex crystal forms characteristic of the helvine group.

Helvine is a relatively uncommon beryllium–manganese silicate and a member of the helvine group, best known from skarn and contact-metamorphic environments. Norwegian helvine, particularly from Hørtekollen, is considered classic and highly collectible, as the locality is well known for producing well-formed crystals and a diverse suite of Be-bearing minerals.

Specimens from Hørtekollen are especially valued by systematic and European mineral collectors due to the locality’s historical significance and the increasing scarcity of fine material.

Mineral Data
What's on the rock

Helvine

Formula: 
Mn2+4(Be3Si3O12)S
Strunz: 
9.FB.10
Crystal System: 
Isometric
Hardness: 
6.0 - 6.5
Streak: 
White
Type Locality: 
Friedefürst Mine, Breitenbrunn, Breitenbrunn District, Erzgebirge, Saxony, Germany

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Shipping Information

Postage Area Price
Germany: Insured parcel 6,20€
€6.20
International Warenpost tracked, not insured max 1 kg - 11€
€11
EU insured parcel - 15€
€15
Worldwide < 5000g insured parcel (UPS/TNT/DHL) 50€
€50
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