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lapis lazuli

Hot Point Testing

Hot point testing can determine if some gem materials are plastic imitations. It can also reveal if a stone is treated with wax or plastic. By Donald…

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 Jewelry Styles

People across the globe have used turquoise for adornment for thousands of years, but this gem material forms naturally only in a few places. Cultures…

37 Blue Gemstones

Blue gemstones captivate us with their connection to sea and sky, representing one of nature’s rarest colors. Today’s gem market…