<https://celticgraniterocks.com/product/rosa-grey/#product>
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"Silestone® is 94% pure natural quartz and is manufactured by the world's leading producer of quartz surfaces for high-quality kitchens and bathrooms. Silestone is Stain Resistant, Acid Resistant, Scratch Resistant, Impact Resistant and uses a new technology (silver ions) to keep bacteria from growing.  Silestone offers a 15-year ertified warranty.  There are 25 edge options and all products are NSF and Greenguard Certified."
<https://celticgraniterocks.com/product/rosa-grey/>