The fossilized resin of conifer trees. The most common colors are honey yellow and various shades of red, but can also be off-white and green.
The real amber produces static electricity when rubbed.
Crystallized iron pyrites ("fool's gold") mounted in groups, cut or uncut, in pins and other pieces of jewelry. Marcasite is a gray, lustrous mineral.
The most successful simulated diamond. Properties such as refraction, hardness, and specific gravity are remarkably similar to diamonds. Cubic zirconia are very hard to distinguish from diamonds; sometimes a jewelers loop will be needed to see the difference.
A metal that is part of the platinum family but is liquid in its raw natural state not not solid like platinum. Rhodium can be applied to base metals, gold, sterling silver, or some other alloy, to give it a shiny white surface like platinum.