As in the Christie's "Jewels : The London Sale" held on June 10, 2009 highlighted previously by AnitaP, signed pieces by reputed jewelry designers an...

The four factors highlighted above for the Christie's "Jewels : The London Sale," held on June 10, 2009, that had a bearing on the prices achieved, al...

Thank you Paul for signing up to our forums. You are most welcome and our community is eagerly waiting for your contributions. Do participate in our f...

Thanks AnitaP for your post. Some significant facts emerge from your post. The 7 lots highlighted by you appeared at the same auctions and hence are s...

The answer to your question Joan seems to be inherent in the wording of your question. The main reason for the exceptional showing of this lot appears...

The quality of his jewelry using a combination of colored gemstones and diamonds, with an almost invisible pavé-setting, mounted on a dark metal alloy...

It is highly unlikely Jack. As Peter has already pointed out, Schlumberger was held in high esteem by Tiffany's that he was among the few designers em...

Thanks pegdenirp for your query, seeking information on the 990.25-carat Paola Emerald rough believed to be in the custody of the HK Bank. Unfortunate...

Rubies and sapphires belong to the same group of minerals called corundum, which is a crystalline form of aluminum oxide. The red color of rubies is c...

Dear Edgar,We have forwarded your request to Rob Weesner, mineral expert and dealer in minerals, who is a regular participant in our forums. His e-mai...

Demantoid is the green variety of Andradite Garnet. Andradite is Calcium Iron Silicate with formula Ca3Fe2(SiO4)3. When some of the Ferric ions in the...

Thanks Joan for your critical analysis of the Catseye Alexandrite Necklace highlighted by Maryjewel. Your observations are perfectly in order. The cat...

Thanks AnitaP and rashid for your updates. With regards to the question raised by rashid, if a blue sapphire and diamond of equal volumes are consider...

Thanks John for your update and Mike for the question arising from John's update. It is indeed true that the 13.14-carat catseye alexandrite of unknow...

The classification is actually arbitrary based on prices achieved at public auctions. There may be discrepancies in this classification, such as a hig...