The ruby, together with the sapphire, are members of the corundum
group, which is the mineralogical name for
oxide that crystallised into gemstones a long time ago as a result
of pressure and heat at a great depth. Chromium is responsible
for the red colour in the corundum.
argued that a strong red fluorescence is desirable and that op-grade
stones should have a minimal amount of black, gray or brown.
Their colour should also look good in any light.
Mogok and Burma and recognised as the most significant locations for
the highest quality rubies. However, that does not necessarily
discount the quality gemstones found in Thailand, Madagascar, Africa
and Vietnam .
Assume it is heated unless otherwise stated,
beryllium, fracture filling with oil, epoxy, or glass
Ultrasonic cleaners and steamers are safe if the stones
aren't oiled, cavity filled, or heavily flawed
red rubies with inclusions - up to $3000 - $4000 USD per carat for a
one carat gem (Newman, 2003)
Rubies can be securely purchased on this
web site at bargain prices ... see