5.78ct Spinel Cluster / Vietnam / Rough Crystal Gem Gemstone Mineral Specimen

5.78ct Spinel Cluster / Vietnam / Rough Crystal Gem Gemstone Mineral Specimen Great investment Museum Grade Natural Red Spinel ✨️ Open to Offers 12.8x9x7.2mm Based on annual production in carats across the world, a natural spinel is rarer than diamonds of any colour, sapphires or rubies. Some spinel colors are more rare and valuable than others. In general, red spinel is the most desirable, followed by fine cobalt-blue spinel, then by vibrant hot pink and vivid orange stones