Peridot bracelet

Peridot is one of the few gemstones that occur in only one colour, an olive green. The intensity and tint of the green, however, depends on how much iron is contained in the crystal structure, so the color of individual peridot gems can vary from yellow—to olive—to brownish-green. The most valued color is a dark olive-green.

Peridot rough

Peridot is gem-quality olivine. Olivine is a silicate mineral with formula of (Mg, Fe)₂SiO₄. As peridot is the magnesium-rich variety (forsterite) the formula approaches Mg₂SiO₄.

Here is a peridot bracelet I bought earlier in the market.