RUBY This is a natural ruby that has had fissure cavity filled treatment. Great colour.

A Ruby is a pink to blood-red gemstone  a variety of the mineral corundum (aluminium oxide]. The common red color is caused mainly by the presence of the element chromium. Its name comes from ruber,  Latin for red. Other varieties of gem-quality corundum are called   sapphires. Prices of rubies are primarily determined by color. The   brightest and best “red” called pigeon blood-red, commands a huge   premium over other rubies of similar quality. After color follows   clarity: similar to diamonds, a clear stone will command a premium, but a   ruby without any needle-like rutile inclusions will indicate that the   stone has been treated one way or another. Cut and carat (size) also   determine the price

TREATMENTS

Unless   a ruby has a certificate as natural all Rubys should be considered to   have had some lead glass treatment.This is usually stated as ‘fissure   cavity filled treatment’ This treatment infuses leaded glass to fill in   cracks and fissures which improves the appearance of the stone.In most   cases the durabilty is not as strong as a natural stone.