![](http://www.alamy.com/thumbs/6/035766D9-DD7E-457F-BF8B-7FE2432E8743/2DH8X6G.jpg)
scheelite metal and crystal mineral sample, used in lightbulb filaments
Size: 4288px × 2848px
Photo credit: © WireStock / Alamy / Afripics
License: Royalty Free
Model Released: No
Keywords: aggregate, black, calcium, cluster, crystal, crystalline, ferberite, filament, gaslight, gem, gemstone, geological, geology, incandescent, lightbulb, luster, manganese, manufacturing, matrix, metal, metallic, mineral, mineralogy, minerology, ore, pegmatite, rock, sample, scheelite, science, semi-precious, silicate, silver, specimen, tungstate, tungsten, tunstate, wolfram, wolframite