Moonstone is sometimes used to produce doublet cabochons. These are made by gluing a slab of quartz to a thin slice of blue flash moonstone. A cabochon is then cut from the material with the moonstone slice serving as the base of the cabochon. When these are properly cut and presented in jewelry the result is a cabochon with an apparent blue moonstone-like color and luster. These can be attractive. Their appeal is a much lower price than a moonstone cabochon. They have one advantage over moonstone cabochons – the quartz cap is a lot harder and suffers much less from abrasion and impact.