Star sapphires and rubies get their asterism from the titanium dioxide impurities (rutile) present in them.
In these parts, sapphires, zircon, jasper, prase, rhodonite, crystals and even gold may be found.
Cooling water circulates above the sapphire top plate.
Each crown in turn was decorated with rubies, sapphires and other precious jewels.
However, the latter term is a misnomer: synthetic color-change sapphires are, technically, not synthetic alexandrites but rather alexandrite "simulants".
Colorless sapphires are sometimes used as diamond substitutes in jewelry.
Sapphires are also shown as being able to show others their greatest love.
In the case of manufacturing rubies or sapphires, this material is alumina.
