High Grade Blue Ithaca Peak Turquoise Oval for your Jewelry Designs Deep, rich Blue color Handcrafted Item Oval Shape Measures Approximately 25 mm in Length by 27 mm in Width 18 Carats Glossy High Polished Finish Lightly Backed for Stability Glossy Highly Polished Finish Mined in Arizona USA Professionally cut by Master Cutter Garrett McGinnis in Manassa, Colorado Ithaca Peak is my personal favorite turquoise. Ithaca Peak Turquoise comes in Light Blue to a Dark Blue with black matrix and often has inclusions of quartz and pyrite. Ithaca comes from The Cerbat Mountains in Mohave County. It is part of The Kingman Mining Operations.