$1,975Median
6Sold (12 mo)
$2,450Last sale
1
Bertrandite on Quartz
1
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The tungsten deposit at Kara-Oba in Karagandy Province, Kazakhstan is renowned for having produced great crystals of the rare beryllium silicate Bertrandite. They are known there in several forms, one of which are the flat-topped prisms seen in this rich miniature specimen. A fan-like spray of pale Smoky Quartz crystals provides the host for many colourless to white, glassy Bertrandite crystals reaching 5 mm in length. The Quartz crystals are themselves slightly etched and have fracture surfaces on the back, but the Bertrandite crystals are very well formed and in perfect condition. This deposit closed in 1996, meaning that all specimens are likely over 30 years old. Ex the superb systematic collection assembled by brothers Martin and Michael Günther (1951-2007 & 1956-2021).
Product details
SpeciesBertrandite, Quartz
SizeSmall Cabinet
Dimensions6.2 x 5.0 x 3.0 cm
Added on05/24/2025
LocalityKazakhstan, Jambyl Region, Kara-Oba W deposit
Current owner
Unknown Owner
Acquired 07/2026·Paid $1,500.00
Previous owners
| Date | Collector | Acquisition price |
|---|---|---|
| — | Crystal Classics | Not disclosed |
Comments