Quartz, Pyrite, Ankerite

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Quartz and pyrite with ankerite, 27 cm, from Spruce Ridge, King County, Washington. Collected with Stan Esbenshade in 1985, from the Louie the Lump zone. Weighing over 35 kilos when found, subsequent trimming reduced it to a svelte 27 kilos. One of the top 3 large specimens ever found at Spruce. Arkenstone specimen and photo, now in the Houston Museum of Science.

Product details

SizeMuseum
Dimensions2700.0 x 2700.0 cm
Added on02/13/2026
Publications
  • Mineralogical Record Self Collected Minerals page 166
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Quartz
Mineral guide
Learn about Quartz
a versatile mineral with clear, milky, and colored varieties; crystal forms, formation clues, and tips for identifying amethyst and citrine.
Quartz
Regional guide
Quartz from Spruce Ridge
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Locality guide
Spruce Ridge
Spruce Ridge, USA - signature Snoqualmie locality yielding quartz with brassy to silvery pyrite, display-quality crystals in rugged pockets.