Ruby in Kyanite Tumblestone 'A' Grade

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Ruby in Kyanite Tumblestone 'A' Grade Ruby is a red corundum, an aluminium oxide with a hardness of 9. The colour is due to the presence of chromium. Kyanite is an aluminium silicate with a hardness of 5 to 7 and a triclinic crystal system. Kyanite is usually found in bladed crystals in the colours blue, green, white, brown or black. This stone is from India and is amazingly a mixture of the two minerals, measures approx. 2.8 cms. Ruby is believed to be a stone of courage and stamina, it encourages one to stand up for the unprotected. Check out my other items ! Be sure to add me to your favourites list ! Please remember if you are making multiple purchases to request an invoice before you pay so I can reduce the postage/shipping costs for you.