11Ammolite
Ammolite is an opal-like gemstone that can be found in an infinite array of colors and is one of a few known biogenic gemstones. It is formed from the fossilized shells of Ammonites (a pre-historic squid-like creature).
12Black onyx
Black onyx stones are actually never completely black. The ones you can buy in-store have instead either been treated to become much darker or are various other types of the gemstone made to look like onyx stones.
13Garnet
The garnet gemstone was named after the seeds of a pomegranate, a plant whose fruits contain abundant and vivid red seeds, which are similar in shape, size, and color to these garnet crystals.
14Peridot
Peridot was Cleopatra's favorite gemstone.
15Graff Pink Diamond
The Graff Pink Diamond is the most expensive single jewel ever sold at auction. The diamond is 24.78 carats and was sold for $46 million.
16Star of Asia
One of the largest sapphires is known as the Star of Asia, which is currently housed at the Smithsonian Museum of Natural History. It is said to once have belonged to the Maharaja of Jodhpur (India).
17Crazy Lace agate
Crazy Lace agate is mined only in Mexico and because of this it is often called Mexican Lace Agate. This stone is found exclusively within the area known as Chihuahua, in Northern Mexico. Crazy lace agate is believed to have been created in the cretaceous period, about 65-90 million years ago.
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18Opals
In the Middle Ages, women would wear Opals in order to protect the color of their blonde hair.
19Amethyst
Once Amethyst Gemstones were considered to be one of the most valuable gemstones on the earth, but the equation changed overnight when huge reserves of it was found in Brazil.
20Amber
Amber is considered to be the softest and lightest gemstone on the face of the earth. This beautiful gemstone is so light that it floats in saltwater.