As the Japanese name for citrine is "yellow crystal",
It is a yellow to golden colored crystal.
Amethyst crystallized deep underground is affected by heat from magma, etc.
It has turned yellow, or the quartz has been exposed to radiation and turned yellow.
Therefore, today, amethyst is artificially grown using this principle.
There is a lot of heated citrine on the market.

Citrine is known for its color, which resembles that of citrus fruits.
It comes from the French word "citron," which means lemon.

Brazil