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The rarest gemstones you’ve never heard of

Since ancient times men have coveted the mineral riches of the earth. Iron, tin, copper, silver and gold have been valued since antiquity, alongside the various gems with which they share the dark rock.   The Ancient Greeks were the first to …

Gemstone spotlight: Alexandrite

Name: Alexandrite Moh Hardness Scale: 8.5 Specific Gravity: 3.7 Refractive Index: 1.76 Colour: Blue-green in daylight; pink-red in incandescent light     Alexandrite is precious gemstone with peculiar properties and a …

Gemstone spotlight: Demantoid garnet

Name: Demantoid Garnet Moh Hardness Scale: 7.5 Specific Gravity: 3.84 Refractive Index: 1.9 Colour(s): Green   The garnets are a family of gemstones, and to the uninformed are regarded as a collective of less precious stones. …

Gemstone spotlight: Topaz

Name: Topaz Moh Hardness Scale: 8 Specific Gravity: 3.49 – 3.57 Refractive Index: 1.643 Colours: Yellow, Pink, Red, Blue, Brown Commonly occurring in yellow varieties, this gem has been valued since antiquity, when the ancient Egyptians …

Gemstone spotlight: Moonstone

Name: Moonstone Moh Hardness Scale: 6 – 6.5 Specific Gravity: 2.56 Refractive Index: 1.518 Colours: Brown, Green, Orange, White and Pale Blue. This gem derives its name from the unique play of light from its surface. This is termed phenomena …

Birthstones

The tradition of assigning magical powers to gemstones and of associating them with the months of the year is very old and differs from culture to culture. Today, probably the most widely accepted is the following modern “birthstonelogy”: January: …