When naming the natural jewellery and jade to be imitated, it should be prefixed with the word “imitation”, のような “imitation emerald”, “imitation pearl”, 等. The use of imitation gems does not represent the specific category of jewelry and jade. The name of the specific jewelry and jade should be given as much as possible, and the following expressions should be used. Such as: “ガラス” または “imitation crystal (ガラス)”.
When the expression “imitation of a certain jewellery jade” (例えば, “imitation diamond”) is used as the name of a jewellery jade, it means that the jewellery jade:
(1) It is not the imitated jewel and jade (例えば, “imitation diamond” is not a diamond).
(2) There are many possibilities for specific imitation materials (のような “imitation diamond”: it may be glass, synthetic cubic zirconia or crystal, 等).
“Imitation” is of course different from “true”. 実際には, it clearly tells you: it is just an imitation of the gemstone.
The common special optical effects of jewellery and jade are cat’s eye effect, star effect, discoloration effect and so on.
When naming a gem with a cat’s eye effect, you can add the word “猫の目” after the basic name of the jewellery and jade, のような “apatite cat’s eye”. Only “Golden Emerald Cat’s Eye” can be directly called “Cat’s Eye”.
When naming gems with starlight effect, you can add the word “スターライト” before the basic name of jewels and jade, のような “starlight ruby”. The method of naming synthetic gems with starlight effect is to add the four characters “synthetic starlight” before the basic name of the corresponding natural jewelry jade, のような “synthetic starlight ruby”.
When naming gems with a color-changing effect, you can add the word “color-changing” before the basic name of the jewellery jade, のような “color-changing garnet”. The method for naming synthetic gems with color-changing effect is to add the four words “synthetic color-changing” before the basic name of the corresponding natural jewelry jade, のような “synthetic color-changing sapphire”.
Except for starlight effect, cat’s eye effect and discoloration effect, all other special optical effects that appear in jewellery and jade, such as placer gold effect, halo effect, 色の変更効果, 等, do not participate in the naming, but can be noted in the remarks.