CHAPTER 7 FIRST/SECOND/THIRD/FOURTH-ORDER COLORS Picture #53 4-inch-wide Madagascar Quartz Ball The color palette of a crystal rainbow is determined by the width of a crack or fissure. A “crack” is a break, suddenly induced, like a conchoidal fracture from a shock. A “fissure” is a slow-moving gap that grows and crystallizes along with the quartz […]
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