We remember, that all red-colored transparent stones were once called rubies. It was not known, that apart from rubies, red can also be much cheaper grenades – pirop or almandine, as red as a spinel ruby, red variety of tourmaline …
Tag: zirconium
Diamond imitations
Diamond imitations
Apart from the primitive way of imitating diamonds with varieties of glass with a high refractive index, colorless sapphires are used to imitate this most valued gemstone., zircons or topazes, sometimes also transparent quartz (Mountain crystal).
A very large factor …