We have learned a lot about gemstones and a lot about the occasional mis-truths in the jewelry and gemstone business.  Our aim is to be an honest, and trusted provider of high quality gemstone jewelry. Our goal is to create beautiful, authentic treasures that will hold their value for generations to come.

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We test all of our Gemstones that are not GIA certified. The tests the we do are similar to the GIA tests, however the GIA has many more tests that can provide more data, especially regarding the origin of the gem. If desired, we can acquire a GIA certificate for any of our gemstones that are not certified, for a small cost. 

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Our Non-Destructive Gemstone Testing Methods

 

1. Calibrated Thermal Conductivity Testing  

 

Portable thermal testers help quickly identify gemstones by measuring how they conduct heat. Each gem type transfers heat differently based on its crystal structure. While some testers claim high accuracy, results can vary depending on the device and the user’s technique. This method is a fast and useful first step, but for complete accuracy, it’s best combined with other tests.

 

2. Laboratory-Grade Diffraction-Grating Spectrometry

 

Spectrometry analyzes how gemstones absorb and reflect light, creating a unique “fingerprint” for each stone. High-quality instruments can reveal details about a gem’s variety, whether it has been heat-treated, and sometimes even where it was formed. When used alongside thermal testing, it offers a clearer picture of the stone’s identity and history.

 

3. Gemological Microscopy

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Microscopy is one of the most revealing tools in gemology. Using specialized microscopes with brightfield, darkfield, and polarized lighting, we study a gem’s internal patterns, inclusions, and surface features. These details can show whether a stone is natural or lab-created, indicate if it has been treated or glass-filled, and sometimes even suggest its geographic origin.

 

4. Refractive Index (RI) Testing 

 

Refractive index testing measures how much light bends—or “refracts”—when entering a gemstone. Every mineral has a distinct refractive index, making this one of the most reliable identification methods. With a refractometer, we can tell look-alike stones apart and even detect double refraction in certain crystals. It’s a simple yet powerful optical test.

 

5. Polariscope Analysis

 

A polariscope helps determine how a gemstone interacts with polarized light. By rotating the gem between two polarizing filters, gemologists can learn whether it’s singly or doubly refractive and spot internal strain or twinning. This test helps distinguish between natural crystals, glass imitations, and composite stones.

 

Together, these non-destructive techniques allow gemologists to identify and study gemstones in depth—revealing their origin, authenticity, and any treatments—without causing harm to the precious material itself.