A question from Salmah:
"Can cabochon emerald be worn for astrological purpose or only the clear one?"
We believe they can. It is Vedic astrology that insists on wearing as clear a crystal for astrological purposes as possible. Maybe Vedic astrology is correct in this, but we have had good results with other stones as well. As an aside, you are probably aware that acquiring a perfectly clear emerald would be very very expensive.