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Product Information “Popcorn Rock” is a naturally occurring mineral found at limited outcroppings in the Great Basin area of the western United States. Simply place the rock(s) in a clear glass bowl then add just enough white distilled vinegar to completely cover it. As the vinegar evaporates, “popcorn-like” aragonite crystals (the main component of many organic substances such as pearl and coral) begin to form. Crystals will grow over a period of 1-3 weeks and with proper care, last for years.  Tell a Friend about this item
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