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Quartz With Petroleum

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PDM849552

Quartz With Petroleum

Fluorescent

Description Tabs

Description
Locality: 
Dakhlet Nouadhibou Region, Mauritania
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.2 × 2.6 × 1.4 cm
Weight: 
12.00gr
Description

Floater crystal group from a new find in the West region of Mauritania, coming directly from a local miner. It features a gemmy Herkimer-type diamond quartz, with oily inclusions that are strongly fluorescent in white under UV light. I have seen about 50 pieces and they are usually smaller than 30 mm. Typical pieces from this locality are very rich in black flattened inclusions, mostly parallelly oriented to the rhombohedral faces, and they are not fluorescent. This piece is also rich in gas bubbles and transparent inclusion that are not fluorescent, and black flattened inclusions. I selected this piece because of the size and gemmyness, richness in fluorescent inclusions and the good condition, but they usually contain micro-chippings in different degree, probably because locals are not use to manage specimens for collectors.

Found in October 2019.

Mineral Data
What's on the rock

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

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