Types of precious stones

Types of precious stones

Types of precious stones

Diamonds, emeralds, rubies and sapphiresare four of the most valuable and sought-after gems in the world.


Diamond is a precious stone formed from pure carbon in a crystalline formation that is generally transparent and colorless. It is also the hardest natural substance on Earth. It occupies the highest place on the Mohs mineral hardness scale with a 10.

It has the highest brightness of all transparent gemstones. Its name comes from the ancient Greek adámas which means “which means invincible or unchanging.”

Diamonds reflect light in an incomparable way, especially when placed under directional spotlights. With every slight turn of the hand, a diamond ring will shine in infinite ways.

“The diamond is the birthstone of April and the jewel of the tenth and sixtieth wedding anniversary.”


The emerald is known for its intense green color and a clear depth that very few gems possess, it is the precious stone that symbolizes renewal and hope.

Lot of 3 Emeralds

The name of the Emerald derives from the Greek “smaragdos” and means “green stone”. This name was applied to all green gems until the progress of science of the eighteenth century allowed to specify the differences.

It is composed of the beryl mineral and derives its green coloration from trace chromium and sometimes also from vanadium. Beryl hardness is between 7.5 and 8.0 on the Mohs scale.

The emerald is the birthstone of May and the jewel of the twenty-fifth and thirty-fifth wedding anniversaries.


Rubyis a generally red gemstone. The tone can vary from a pale pink to a purple or even dark crimson. It is a variety of the corundum family, famous for its intense red tone and brightness. The hardness of the ruby is 9.0 on the Mohs scale.

Over the years, the best quality rubies have broken auction price records, demanding the highest carat value of all colored gems.

Ruby is the birthstone of July and the jewel of the fifteenth and fortieth wedding anniversary.


Sapphire is also a variety of corundum.

Pure sapphires are actually white, but in the presence of traces of titanium and iron they acquire a velvety blue color. In addition to this classic tone, there are the so-called “fancy sapphires” available in all colors, from green to pink and even black, except red sapphire, which is ruby.

Sapphire is the second toughest natural substance after diamonds with a rating of 9.0 on the Mohs scale.

And a great poet once described sapphire as “the blue of a clear sky minutes after sunset.”

Sapphire is the birthstone of September and the jewel of the fifth and forty-fifth wedding anniversary.

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