Sapphire (Greek - blue) used to be applied to a variety of stones. In
antiquity and as late as the Middle Ages, Sapphire was used in the same sense as
lapis lazuli is used today. Around 1800 sapphire and ruby were of the corundum variety.
At first the blue ones were considered sapphire, and the other color corundum (with
the exception of red) special misleading names, such as "Oriental peridot" for the green
variety and "Oriental topaz" for the yellow type. Today corundums of all colors except red
are called sapphires. Red varieties are called rubies. Sapphires are referred to by
description i.e. yellow sapphire, green sapphire. Sapphires without the qualification
are called "blue corundum". Orange pink sapphire is called padparadschah
(sanahlese for "Lotus Flower").
Yellow : weak; yellow, light yellow
Green : weak; green-yellow, yellow Purple : Definite; purple light red
Yellow: 4710, 4600, 4500
Green: 4710, 4600-4500
Yellows from Sri Lanka: weak; orange Colorless : orange-yellow or purple