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Sambhav Karnawat

I have interest & expertise in Platinum Jewelry & Ruby, from Ruby roughs to polished Rubies to Ruby Jewelry. Anything about Rubies, I'd love to talk!

Rolfe Foxwell

I will answer any questions regarding semi-precious stones or precious stones. I will answer questions regarding mounting both semi-precious and precious stones. I can also answer most questions regarding small manufacturing. I can not answer questions regarding casting or fine jewelry.

Rod Keady

all info pertaining to australian opals and opal fields is ok. online valuations is difficult but not entirely impossible. Photographs of stones should clearly show weight in carats and scale in mm. naturally photographs of opals are the hardest thing to take as a slight shift in direction displays a new colour or plane


Have a question about jewelry repair or working with precious metal jewelry and gemstones? For many years up to December 31, 2010, I was a working professional bench jeweler, involved everyday with setting stones in mountings, designing and making jewelry, repairing and limited custom manufacture. If you work with jewelry as a hobby or as a profession, I might be able to help. I deal with the retail business, not mass production. Ask privately if you wish. See the box for that: It keeps your question between us. Please DO NOT ask MAKER'S MARKS, but metal quality marks are fine to ask. Please DO NOT ask diamond prices. See a gemologist for that.

Uwe Richard Kackstaetter, Ph.D. (Dr.K)

I can answer questions concerning minerals, mineralogy, gems, metals, and anything that has to do with geology. However, I am NOT a jeweler. Questions about values, settings, gem stone cuts and appraisals are best directed to other experts on this site. I can however aide in the identification of unknown mineral materials. As a public service and part as training for new geoscientists, our university department provides FREE mineral identification for individuals. Please contact me for details or go to for details..

Recent Answers

2016-10-05 Tarnish on gold caused by silver polish:

Christine, it looks like the gold plate was removed.  The plated layer was likely thin to start, no polishing recommended!   So what to do?  YOu need to call jewelers in your area and see if they do gold

2016-09-27 jewery meaning of the stamp:

Denise, the mark is not cler as to meaning.  I suspect the items are plated but could be wrong. The markings are not commonly seen for gold plated.   I recommend to know for certain, go to a jeweler to

2016-08-27 Orange Ethiopian Opals:

Hello Jo Anne,  Thank you for your question ...  Ive seen many Ethiopian Opals on EBAY , they appear to in abundance at present .  Although the colour looks terrific .Ethiopian Opals are Hyrophane  ( that

2016-08-24 Indentification:

Hi Amy,  This is very pretty but is most likely not natural. You are looking at a chunk of discarded glass from the glass making industry. These are common and are often sold as pretty garden rocks. When

2016-08-24 Mineral Indentification:

Hi Amy,  Unfortunately your pictures are very fuzzy and I can only postulate or speculate about your rock. It looks like that you have found a piece of "graphic granite". A good place for these type of

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