SPHENE ( TITANITE )
Is a calcium titanium neosilicate with formula CaTiSiO5 and hardness of 5-5.5
Another stone with a very strong pleochroism and a large variation in colours:
colourless, brown, yellow, green, blue, pink, red and black.
Unfortunately his low hardness ( 5.5 from Mohs scale) does not allow it for jewellery use, instead is a real collector stone.From Madagascar.
Size: 6.2x4.2x3.3 mm.
Weight: 0.72 ct.