A list of Precious and Semi Precious Gemstones and their Treatments

Precious stones and semi precious stones

What Is A Precious Stone?

What is the difference between precious stones and semi precious stones? These terms are based on old traditions from the west. These days, all gemstones are considered precious since they are all rare and there is a limited supply of them.

The traditional precious stones are:

All other gemstones are considered as being semi precious stones. These are old terms and not necessarily true these days. To view the treatments associated with each of these stones, visit our Technical Information On Gemstones page.

List Of Precious and Semi Precious Stones

Buy Agate From GemRock Auctions

Agateis a gemstone found in many continents from Brazil to Afghanistan to Australia. Agate can have many natural patterns and comes in a variety of natural colours.

Buy Amethyst From GemRock Auctions

Amethyst is the most common and well known form of Quartz. Amethyst ranges in colour from purple to deep bluish purple.

Buy Aquamarine From GemRock Auctions

Aquamarine is the blue variety of Beryl. Large crystals can be found which can be cut into large clean gemstones.

Buy Carnelian From GemRock Auctions

Carnelian is a glassy, translucent gemstone that is typically light brownish-red to deep transparent stone. Carnelian belongs to the quartz family of gems and has been called Red agate or Red chalcedony in modern times.

Buy Citrine From GemRock Auctions

Citrine is the orange to yellow form of the mineral Quartz. This gem can often be found as large clean faceted stones with the primary source being Brazil.

Buy Diamonds From GemRock Auctions

Diamond is the hardest and most well known gemstone. This is on for the gemstones that is considered a precious stone.

Buy Emerald From GemRock Auctions

Emerald is the green variety if Beryl and is the most sought after. Emerald is considered a precious stone. The best Emerald comes from Columbia. There is a new source of Emeralds from Zambia which is becoming very popular.

Buy Garnet From GemRock Auctions

Garnet is a large group of gemstones that covers multiple types. Garnets include Rhodolite, Pyrope, Demantoid, Tsavorite, Spessartite and Andradite.

Buy Iolite From GemRock Auctions

Iolite is a purple gemstone that has a very unique property. When you tilt the stone, it turns colourless. In ancient times, it was called the water Sapphire because the colour would disappear when it was tilted.

Buy Jade From GemRock Auctions

Natural Jade gems were discovered over 7000 years ago. Jade was very popular in ancient times for its toughness and was used for making tools and weapons.

Buy Kunzite From GemRock Auctions

Kunzite is a semi precious stone that is the pink variety of Spodumene. This gemstone has been used in large costume jewelry for years.

Buy Lapis Lazuli From GemRock Auctions

Lapis Lazuli is a semi precious stone that comes in a variety of blue colours. If usually has some pyrite visible from the surface giving it a unique look.

Buy Pearl From GemRock Auctions

A pearl is a hard, rounded object produced by certain animals, primarily molluscs such as oysters. Pearl is an organic gem and has been used as jewelry for centuries.

Buy Ruby From GemRock Auctions

Ruby has been referred to as the King of Gemstones and is one of the precious stones. Some of the most valuable gems in the world are Rubies

Buy Saphire From GemRock Auctions

Sapphire is the precious stone that is most commonly know. It is the most popular coloured gemstone after Diamonds.

Buy Tanzanite From GemRock Auctions

Tanzanite was first discovered in 1967 and is found only in a relatively small area, approximately five square-miles, near the Kilimanjaro Airport in Tanzania, East Africa.

Buy Topaz From GemRock Auctions

Topaz is generally found as a bright blue gem in the market. Almost all Topaz has been irradiated to alter the colour of the original gem.

Buy Tourmaline From GemRock Auctions

The semi precious stone Tourmaline comes in every colour of the rainbow. The most valuable Tourmaline comes from an area called Paraiba in Brazil.

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