Koa is a fabled tree, and wood, sourced responsibly from the Hawaiian islands. It is reddish brown in color, takes a beautiful polish, and can occasionally offer very fine figuring/curl and chattoyance. William Henry uses only the highest grade of figured Koa (as available) for our work, resin-stabilized for durability.
Citrine is a variety of quartz whose color ranges from a pale yellow to brown due to ferric impurities.
The name is derived from Latin citrina which means “yellow” and is also the origin of the word “citron.” Sometimes citrine and amethyst can be found together in the same crystal, which is then referred to as ametrine.