Ardoise et pyrite - Paire Bijoux / Jewellery It has a higher hardness

It has a higher hardness than other types of jet

sulphide and even orpiment (a pigment composed of arsenic

Hardness: 9

Pair of malachites crossed by a vein of blue azurite

Ardoise et pyrite - Paire Bijoux / Jewellery It has a higher hardnessPair of slate containing a multitude of small pyrite crystals. This natural combination of pyrite in slate is perfect for modern and contemporary jewelry. Slate is a rock metamorphic from a clay that belongs to the family of shale. Variety: Slate Color: Dark gray and gold Dimensions: 8. 00 mm Shape: Square slice Hardness: 5. 5 Actual product colors may vary from colors shown on your monitor.