It is an aluminate of beryllium having traces of iron and chromium.
hardness- 8.5 on moh's scale. Colour is black, grey, green, white.
It cures the ill effect of ketu(drogon's tail)
i.e,disturb in physical body. It is responsible for healing of black magic, evil spirit,saves from hidden enemies,
bring luxuries and wealth by making the ketu dasha favourable,makes active,intuitive,innovative gives spiritual
knowledge ,wisdom,saves from accidents and itself splits in parts,so Moksha karaka.So in this way enthuse fresh interest in
life.
planet-Dragon's tail
sign-pisces
metal-silver,iron
Mantra :- Oum kem ketwe namah .