Is there any gemstone which is more expensive than diamond?
Most expensive Gemstone?
I think ruby is the most costliest of the gemstone.
I disagree. If we are talking about clean, faceted gems, I vote for GRANDIDIERITE (one known specimen), MUSGRAVITE (8 known speciments), or SERENDIBITE (3 known speciments).
I agree that Ruby is probably the most expensive consumer gem.
I think Alexandrite is the most expensive gem in the world. Others can be Tanzanite and Paraiba Tourmaline.