The Aquamarine


Chrysobéryl


Diamond


Emerald


Garnet


Opal


Peridot


Rubis


Saphir


Spinel


Tanzanite


Topaz


Tourmaline


Zircon

Rubis

Properties
Refractive index Hardness (out of 10) Density
1,760 - 1,768 9 3,97 – 4,05

Owes its name to its red colour, which comes from the Latin word “ruber”. The Ruby’s colouring substance is chromium, sometimes supplemented with iron, when the gemstone takes on a Brownish colour. The most sought-after colour is the “pigeon’s blood”. Although Rubies are 140 times less hard than diamonds, they are not less far behind them when it comes to hardness. On the other hand, it is seven times harder than the Topaz. The nature of the inclusions provides many clues regarding the stone’s place of origin. The rutile inclusions can produce an asterism effect (a six-pointed star). The most important mines are located in Myanmar, Thailand, Sri Lanka, and in East Africa. Rubies are one of the most expensive precious stones, and large rubies are rarer than diamonds of the same size. For centuries, most rubies are heated in order to intensify their colour, reduce the violet streaks, and improve their transparency. The new heating technologies can leave vitrification residues in some of the cracks leading up to the surface. This must be clearly indicated.

2.29 Rubis BN CS SSEF 35-01''
  • Dimensions: X

Ruby
2.29 cts
Cushion Cut
Unheated
Burma

Ruby 2.62ct
  • Dimensions: X

Ruby
2.62 cts
Oval