Jewelry alphabet – how to use gem letters instead of personalized engravings

There is a system, of French origin, that allows to record messages on jewelry using gems whose names begin with specific letters. For instance, the so-called “Regard” rings had inscriptions formed by a combination of such stones:
Ruby
Emerald
Garnet
Amethyst
Ruby
Diamond
Lapis lazuli
Opal
Verd antique
Emerald
You can easily write a simple motto or a name using this system. There is even something secretie and mysterious about it. The only problem is that it may be difficult to find gems that begin in certain letters. I suppose you can replace them with other types of minerals or use the same gemstone for more than one letter (Ruby can represent both R and Y)
