Learn how to spot diffusion treated gems with a simple immersion test. This common treatment for sapphire can significantly reduce their value…
When is a VS clarity diamond the best option for your engagement ring? Learn about diamond clarity grades and how to choose the stone that’s right…
Ruby-glass composites and leaded glass ruby clarity enhancements are difficult for gemologists to detect. Learn how to identify these gems and…
Gemologists use refraction liquids to identify gemstone refractive indices (RI). Learn about the properties of these liquids and safe RI testing…
HPHT diamond treatments can only be positively identified with costly equipment. However, you can learn to assess the probability that a stone…
There’s more to aquamarine color than blue. Most natural stones start blueish green and are heated to blue. Learn the pros and cons of this treatment.…
Quartz color treatment results vary due to the stone’s origin. Learn the effects you can achieve with different materials and radiation and heat…
How will a VS2 clarity diamond look in an engagement ring? Learn if it’s the right stone for you and how to pick the best one within your budget.