Lepidolite is part of a three-part series consisting of polylithionite, lepidolite, and trilithionite. Rubidium is a minor component in lepidolite. Occurs in lithium-bearing pegmatites with spodumene, lepidolite, and tourmaline. Associated minerals include&colon; quartz, albite, petalite, eucryptite, lepidolite and beryl. It has only been found as a coating on a single crystal of lepidolite. Lithium is present as spodumene or lepidolite within pegmatite. Pegmatites are the primary source of lithium either as spodumene, lithiophyllite or usually from lepidolite. Arfwedson later showed that this same element was present in the minerals spodumene and lepidolite. It is commonly associated with topaz, cassiterite, wolframite, lepidolite, spodumene, beryl, tourmaline, and fluorite. Amblygonite occurs with spodumene, apatite, lepidolite, tourmaline, and other lithium-bearing minerals in pegmatite veins. He claimed to have found element 87, now called francium, in pollucite and lepidolite. Associated mineral species include elbaite, lepidolite, spodumene, columbite-tantalite, wodginite, and microlite. Association minerals include&colon; albite, lepidolite, topaz, beryl, tourmaline, spessartine, tantalite and fluorite. It is usually associated with lepidolite, beryl, quartz, albite, amblygonite, and spodumene of pegmatitic origin.