Turquoise Buying Guide
Revered through the ages for its color, turquoise jewelry has come to symbolize protection and hope. Used widely in antique jewelry and often…
The Color Turquoise
Turquoise is one of a small group of gemstones whose name is synonymous with a specific color. Descriptions like “emerald green”…
Turquoise Treatments and Synthetics
According to some estimates, less than 5% of all turquoise mined worldwide is suitable for gem use without enhancement. Consequently, turquoise…
Gray Diamond Value, Price, and Jewelry Information
Diamonds with a pure gray hue are a rare treasure indeed. More often, gray is mixed with blue or violet hues, but it can present as a modifying hue alongside…
Turquoise Treatments and Synthetics Guide
Almost all turquoises receive enhancements for jewelry use. Learn how to identify the most common turquoise treatments and synthetic options.…
Yellow Diamond Value, Price, and Jewelry Information
When someone mentions diamonds, the first image that most people think of is the colorless variety. It may surprise you to learn that only a tiny…
Red Diamond Value, Price, and Jewelry Information
The discovery of any fancy-colored diamond is an exceedingly rare and exciting discovery. Diamonds that are predominately red, meaning that…
Orange Diamond Value, Price, and Jewelry Information
Quite a few diamonds on the market display orange as part of a multi-hued color. However, orange diamonds with an unmodified hue are one of nature’s…
Purple Diamond Value, Price, and Jewelry Information
Purple is a powerful color that historically has been linked with wisdom and royalty. In some cultures, it was a color that was reserved for only…
IGS Become Member