I stumbled upon this pair of rare magnificent, old-mine cut, pear-shaped Golconda diamonds, with ear pendant mounts weighing 27.72 carats and 33.83 ca...

Welcome aboard russellmark. We are happy to have you in our forums and are eagerly looking forward to your contributions.

Thanks Joan for making this important observation. However, the stringent Gubelin criteria for clarity, color, transparency, cut and shape, will autom...

The Gubelin Gem Lab criteria for Golconda diamonds do not mention anything about the blue afterglow in direct sunlight observed in many Golconda diamo...

The criteria laid down by the Gubelin Gem Lab based in Lucerne, Switzerland, to characterize a diamond as Golconda is more stringent than other author...

According to gemologist Richard W. Wise for a Type IIa, D-color diamond to be characterized as a Golconda diamond, it should possess at least three v...

What are the criteria applied to decide whether a given Type IIa, D-color diamond also known as "top color" diamond, qualify to be categorized as a "G...

Thanks for your comments Mr. Richard Wise, on our webpage titled the Golconda-D diamond, and the question raised by you about its grading and fluoresc...

Her Majesty, Queen Elizabeth II, has been observed wearing all three versions of the Grand Duchess Vladimir Tiara on different formal occasions, as re...

The Vladimir Tiara, belonging to the personal jewelry collection of Queen Elizabeth II, is indeed a very versatile tiara. There are three different ve...

Thanks for your contribution Norma. You are absolutely correct. The Queen never gifted the Vladimir Tiara to Princess Diana after her marriage to Prin...

In our account on the "American Golden Topaz" under the main heading "History of the American Golden Topaz" and sub-heading "The Processing of the Ame...

Welcome to our forums. Your contribution as a jewelry designer would be vital for the success of this forum. You can upload pictures and descriptions ...