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It is my understanding that coefficient of expansion and specific gravity are two different qualities. How do they relate in terms of their use in pearl nuclei?

I must concur with the low grade appearrance of the setting. It looks like a "one size fits many" mounting, not made for the specific "pearl." As well, the faceted stones with it, though it is hard to tell for sure from such photos, (they could be dirty) just don't show the refraction one would...

Here's an interesting NY Times report on the 2007 Intergovernmental Panel on Climate Change on the projected effects of global warming: http://dotearth.blogs.nytimes.com/2009/02/26/why-2007-ipcc-report-lacked-embers/?emc=eta1

Here is one more from my little collection. It consists of three pearls incorporated to varying degrees into the shell. The large one shows very clearly the alternating layers of nacre and conchiolin within the pearl. Like the previous X-rays, I have enhanced the brightness and the contrast to...

I'm not sure if it fits any kind of golden mean, but it is a lovely nautiloid curve. Here's the X-Ray with a more horizontal orientation. Note the "ghost" to the right. I think it's a reflection off the film but will be checking further. Also, there's another odd shaped ghost to the left where...

I have not yet given much thought to a setting.

Actually--the dental assistant--and myself when she was too busy.

This one is the other of what I consider my two best and it's a true "Berry Blister." It's cut out but it has not been finished out for setting yet. This one is a cluster of six solid pearls that I am assuming came loose from the mantle together and were cemented to the shell with either...

Hello--I've neglected this thread for quite a while, but have been getting X-rays and photo's processed to show a series of my finds and possible analysis of some of the anomalies that I have found. I have several ready or in the process and I will start out with one of what I consider my two...

I thank everyone who has taken a stab at providing information about these pieces. There is obviously a fund of extensive and valuable knowledge held by the members of The Pearl Guide. However, I think that there is some misunderstanding concerning what I wish for knowledgeable members to weigh...

I find this to be a rather odd estimate of the value of the piece as it contains more value than $200 in gold by weight. If I could buy even used gold items, not to mention vintage pieces, at that sort of price I would gladly buy and resell them on an ongoing basis........

I am posting photo's of the marks on the backs of the ring and pendant. The one on the pendant is a little hard to decipher so I have posted more than one. I had a further conversation with the owner of the jewelry and was able to clarify some points. She stated that her grandmother brought them...

How terribly generous of you to make such a donation from your small stash of the rare and elusive Lop Noor pearls!

A client of mine has brought in a pendant and a ring that she has inherited. She would like my opinion of them and, after looking at them, I told her that there is some chance that one or both of them were set with natural pearls. I am posting photos of them here along with description and...

That's one beautiful pendant! Good job! I've always loved the nautiloid/ammonite swirl. I purchased two series of graduated ammonites at the Tucson show a few years ago. This inspires me do do something with them--in my spare time.......

It looks like you're having a terrific time! Thanks for letting us enjoy it vicariously.

Yes--we're all quite jealous..... ;)

What would a fast 7 meter rise in the oceans levels mean to pearl production--or about any enterprize one might name....... http://www.nature.com/climate/2008/0809/full/climate.2008.88.html

This isn't an illustration of acidification, but it graphically shows changes that are happening because of rising surface levels in our oceans right now. http://www.nature.com/climate/2009/0902/fig_tab/climate.2009.3_F1.html

Yes Laurenb, you're absolutely right. No matter what the weather does, we face potential disaster from the increasing acidity of the ocean. What the actual, final results will be we can't, at this point, be sure, but they will undoubtedly be immense and almost certainly not to our liking and...