Opulent
OtOt / nOt
Appearance
Opulent acts as a modifier on other genes, altering patterns, white patterns, and other mutations to give them a golden or metallic color and sheen. Opulent can also optionally cause a freckled effect through the coat and small streaks in the mane and tail, and gilded filigree anywhere on the body (either as a pattern on the fur, or as '3D' gilded filigree). Filigree can be combined with the Opal mutation for gems embedded in the lace-like patterns.
Opulent can affect horns and hooves, turning them into a shiny metal.
Opulent doesn't have to fully affect a pattern, it can also cause golden accents such as filling or outlining the pattern. It can co-exist with other mutations, for example with lich it may turn the bones gold, on serpent it can cause the scales to be golden or have a golden rim.
Affects mane and tail if the pattern/marking it's altering does.
Opulent should always be either gold, silver, bronze or copper, and should generally have a metallic highlight or sheen. Variations are also allowed, such as white gold or rose gold. If shimmer is present then opulent can be other colours as well (restricted to the palette of shimmer present) while still having a metallic sheen.

Opulent filigree
chestnut + opulent

Opulent freckles
chestnut + opulent

Opulent leopard appaloosa with unaffected white markings
chestnut + leopard appaloosa + opulent

Opulent opal causing golden gemstones and a golden sheen through the coat
chestnut + opal + opulent

Opulent pard
chestnut + pard + opulent

Opulent roan in a rosy gold tone
chestnut + roan + opulent

Opulent tabby in a silver tone
chestnut + tabby + opulent

Tabby with opulent accents
chestnut + tabby + opulent

Opulent horns