Established in 1931, the Gemological Institute of America (GIA) is the world’s foremost authority on diamonds, colored stones, and pearls. A public benefit, nonprofit institute, GIA is the leading ...

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Rach Gia is around 40 days in advance, so don’t leave your flight to the last minute. Looking ...

But the Mohs scale is deceptive. The steps between the minerals are not evenly spaced. For example, diamond is only one number away, but it’s many times harder than gems in the corundum family.

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