Anglesite

Anglesite is usually colorless or with a slightly yellowish tinge. However, it may also be found as green, grey, brown, purple, or black crystals. It is essential to note that the black color is due to inclusions of galena. Crystals are heavy, but are fragile and soft. They have a perfect cleavage and are faceted for collectors only.

An anglesite stone is generally found in a galena matrix. Similarly, an anglesite crystal has a pointed end.

Occurrence

Anglesite is formed by oxidation of galena (lead sulfide) and may be found in the Leadhill district of Scotland. The best quality crystals occur in Tsumeb (Namibia) and Morocco. Other localities include Sardiania, Germany, and the USA.

Anglesite Properties

• Specific Gravity: 6.35
• Refractive Index: 1.87-1.89
• Birefringence (DR): 0.017
• Luster: Waxy to adamantine
• Crystal Structure: Orthorhombic
• Composition: Lead sulfate
• Hardness: 3

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