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Quartz With Petroleum

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PDM754674

Quartz With Petroleum

Fluorescent

Description Tabs

Description
Locality: 
Dakhlet Nouadhibou Region, Mauritania
Class: 
Single Crystal
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.4 × 2.6 × 2.5 cm
Description

From a new find in West Mauritania, coming directly from a local miner. It is a gemmy floater Herkimer-type diamond quartz crystal with white and blueish petroleum 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 (see specimens PDM751765 or PDM751766) are very rich in black flattened inclusions of pyrobitumen, mostly parallelly oriented to the rhombohedral faces, that are not fluorescent. However I selected this piece because they are big and quite clean, they are rich in fluorescent inclusions and they are in good condition, but they usually contain 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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