Tones of grey and black with copper-coloured inclusions.
Astrophyllite is a hydrous potassium iron titanium silicate mineral (easy for you to say!). With a Mohs’ hardness of 3 it is not suitable for rings or bracelets but can be used in pendants, brooches and earrings. It is a brittle stone and has perfect cleavage – something for the jeweller to respect while setting this stone!
Hardness – resistance to scratching and wear
Stability – resistance to alteration by light, heat or chemicals
Toughness – resistance to fracture, cleavage or cracking
Please note you will receive the stone in the photograph