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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.

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

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.

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!

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..

Melinda Nolan

On Vacation
returns 12/31/2016
(Please do not send questions about hallmarks or stamps on jewelry. I am not an expert in identifying marks. Thank you.) Feel free to post questions about the process of one of a kind jewelry manufacturing, gemstones, diamonds, the precious metals, industry trends, purchasing, quality, care and maintenance, appraisals, insurance, stone cutting, jewelry repair, etc. I am NOT equipped to answer questions about age or value of a piece without seeing it in person, and even then, I am not an expert in antiques. Nor am I an expert in stamps or marks that are inside the jewelry. There are hundreds of thousands of manufacturer's out there and then you factor in the number of years a piece of jewelry can circulate, it becomes an enormous amount of possibilities. I am really not the right person to ask about such markings.

Recent Answers

2016-11-22 CZ/Gold:

Dear Alexa, the alcohol will not affect the gold or the CZ stones. Denatured alcohol is possibly a stronger sterilizer agent.(Alcohol without the water content of isopropyl: Used to dilute some wood finishes

2016-11-05 Where is the best (safest) place where:

This question is not easily answered.     First, all gold dealers will have some mark-up. You will always pay a little bit more than market value. The mark-up for a gold dealer with integrity should be

2016-11-05 Bands, Earrings for Women:

Hi,  1. We do not make jewellery in pure gold. We can craft in 22K Gold, 18K gold or Platinum (Pt 950).  2. Fitting of Rings & arms will depend on ring sizes & arm sizes. I the sizes are same, yes we can

2016-10-30 Pink marquise cut ring, gold color but stamped 925:

Hi Wendy,    While this question is somewhat out of my field of expertise and best addressed by a jeweler, let me give it a try relying on my background.    The number 925 usually indicates silver (92

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

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