The mineral corundum.
No. Garnets are a different class of mineral and generally less valuable. Both ruby and sapphire are variants of corundum.
Ruby and sapphire are oxides of aluminum. They are both forms of the mineral corundum, with ruby being red in color due to the presence of chromium and sapphire coming in various colors, with blue being the most common, due to the presence of iron and titanium.
Rubies are part of the corundum mineral group.
Ruby and sapphire are both gem varieties of the mineral corundum, an aluminum oxide.
Sapphire is a variant of the mineral corundum.
Diamond, sapphire,emrald, ruby they all are expensive
Jade, emeralds, salt (under microscope), ruby, sapphire, diamond, sulfur, turquoise
Sapphire comes from the corundum mineral family, which is an aluminum oxide (Al2O3). Corundum consists of pure aluminum oxide, it also contains trace amounts of other elements such as iron, titanium and chromium.
The ruby and sapphire are on fire red and leaf green don't worry about the in ruby sapphire or emerald.
A mineral is similar to a stone. It size depends on the size one has harvested from the mine/earth/etc.
Aluminium isn't a mineral (it doesn't occur naturally). Perhaps you are thinking of alumina, which does have transparent mineral forms called corundum (ruby, sapphire, padparadscha).
Combined with the sapphire the ruby and sapphire will allow you to trade with ruby and sapphire and emerald.