Rutilated quartz threads golden, copper and silver rutile needles through clear crystal — “Venus hair” to the ancients, abstract art to modern eyes. Brazil supplies most fine material; hardness 7. No two needle patterns have ever matched.Every rutilated quartz at GEMIC Institute is natural, laboratory-certified, and filmed so you can study the exact needlework you’re buying. Unique stones; tracked worldwide delivery, 30-day returns.