Please call (858) 255-8085/ email info@gemslajolla.com to schedule your appointment.
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La Jolla Jewelry Appraiser Blog

La Jolla Gem Appraisal applies advanced technology to identify natural versus synthetic diamond

La Jolla Gem Appraisal applies advanced technology to identify natural versus synthetic diamond

In the trade, it is essential that laboratory-grown diamonds can be identified because consumers need to know what they are buying, and because there are often significant price differences between them and natural gemstones.  It is increasingly important for gemologist appraisers to make that call of diamond origin (natural or synthetic) when appraising jewelry to produce credible reports for their clients.  Because laboratory-grown diamonds are essentially chemically and optically the same as their natural counterparts, traditional gemological observations and old-style “diamond detectors” are not able to tell them apart.  Identification at a professional gemological laboratory or using sophisticated devices developed...

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Fracture-filling in diamonds: a treatment to enhance diamond clarity but it needs to be disclosed to the consumers

Fracture-filling in diamonds: a treatment to enhance diamond clarity but it needs to be disclosed to the consumers

What is fracture-filled diamond? There are many diamonds (both loose and mounted stones) that come across my desk on a daily basis for inspection as a part of the appraisal process.  One of them is this diamond.  It is an otherwise I3 in clarity before treatment (I3 is the lowest clarity grade in the GIA diamond grading system that I3 diamonds are highly included by fractures, crystals and other types of inclusions).  By the time I graded this diamond under 10x magnification, it is considered by myself as I2.  What did they do to this diamond to enhance its clarity? ...

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How To Date Diamonds?

How To Date Diamonds?

Diamond in kimberlite.  Photo courtesy of Geology For Investors Scientists estimate that the earth is about 4.6 billion years old.  According to GIA, research published in 2010 indicates that the youngest known diamonds—found in a Brazilian kimberlite—are just 107 million years old.  On the other hand, the oldest known diamonds—from Canada’s Ekati mine—are as much as 3.5 billion years old.   Scientists measure the age of a rock with a process called radiometric dating. The minerals in a rock might contain radioactive elements. If they do, those elements give off atomic particles as they decay. As a radioactive element emits...

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Clarity Enhancement in Emerald and Its Affect On Value

Clarity Enhancement in Emerald and Its Affect On Value

It is a common practice in the trade that virtually all emeralds have been fracture filled by oil, resin or other substances to enhance their clarity, sometimes to enrich their color, or even durability.  The geological conditions where emerald grows just make it very rare for emerald to be eye-clean. Therefore, emerald is classified as Type 3 according to the GIA colored stone grading system. Whatever the substance is to fill emerald's fractures, they want to use the one that has the refractive index (RI) closest to that of emerald possible, so the substance can blend well in the emerald's...

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Why Do You Need Jewelry Appraisal And How Much Does Appraisal Cost?

Why Do You Need Jewelry Appraisal And How Much Does Appraisal Cost?

The most common reason for appraising your jewelry is to obtain insurance coverage.  There are two important elements of an appraisal for insurance: value and description.  The value on an appraisal sets only the upper limit of insurance coverage while determining the premium you pay.  An appraisal with an over-inflated value will cause you to pay a higher premium than is necessary, but will typically not result in a higher “cash-out” in the event of a loss.  Most insurance companies consider the description of the jewelry when replacing an item that was lost or damaged.  A vague description allows the...

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