Associated minerals include tanarakite, ardealite, hydroxylapatite, variscite and gypsum. Stones which are opaque or semi-opaque such as opal, turquoise, variscite, etc. The Bigfork Chert is known to produce planerite, turquoise, variscite, and wavellite minerals. At one time, variscite was called "Utahlite". Variscite often contains white veins of the calcium aluminium phosphate mineral crandallite. It is sometimes confused with turquoise; however, variscite is usually greener in color.