含石油的水晶（Petroleum-included Quartz Crystal）在長波紫外線的照射下會呈現金黃色的螢光。
This listing is for between 9 and 12 (depending on size) Quartz crystals, most doubly-terminated, with 3-phases of hydrocarbon inclusions – yellow liquid Petroleum, solid black carbon, and methane gas bubbles, from Wahd, Baluchistan, Pakistan, in a 1 inch ‘gem round’, chosen at random. Fluoresces neon blue under both SW and LW UV.
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