High-grade natural turquoise is exceedingly rare. Gem vendors around the world fill their stores with beautiful sapphires, emeralds, and diamonds; rare, valuable gems indeed. Increasingly elusive high-grade, gem quality turquoise surpasses these precious stones in rarity. Most of the best mines have been exhausted for years. Remaining active mines yield few high-grade gems among mostly commercial- to low-grades of rough material. Collectors especially seek gems with a spider web matrix. A miniscule percentage, I believe less than 1%, of all turquoise ever mined displays a crisp, symmetrical web pattern. Lovers of turquoise scramble to acquire the few gem-quality stones remaining among limited stashes.