CRYSTALS & GEMSTONES: Allergen or Not An Allergen?

CRYSTALS & GEMSTONES: Allergen or Not An Allergen?

Not An Allergen. Crystals & Gemstones Mineral crystals (like agate, chalcedony, malachite, tiger’s eye, and amethyst) and rocks that are considered gemstones (like jade and lapis lazuli) are not published skin allergens. But look out for those that may be contaminated with allergens like nickel, cobalt, gold, or chrome. Reactions can also occur with handling, such as if …