18K Yellow Gold Paraiba Tourmaline Stacker Ring

Overview Specs Documentation This dainty geometric stacker ring features a beautiful neon blue-green Paraiba Tourmaline and is set in 18K yellow gold. Metal: 18K Yellow Gold Gemstone: Paraiba Tourmaline Size 6.5 Do you need a different size?  If you need a smaller size, we offer a complimentary resize. If you need a larger size, please inquire with size via info@rockshopjewelry.com for a quote. When you're ready for checkout simply specify your desired size. We will resize the ring and ship within 7-10 business days. BIRTHSTONES & ANNIVERSARIES Tourmaline is a birthstone for October. Tourmaline is also the gem of the 8th wedding anniversary. MINERAL: Tourmaline CHEMISTRY: Elbaite Na(Li1.5,Al1.5)Al6Si6O18(BO3)3(OH)4 Dravite NaMg3Al6Si6O18(BO3)3(OH)4 Liddicoatite Ca(Li2Al)Al6Si6O18(BO3)3(OH)3F Chromedravite NaMg3Cr6Si6O18(BO3)3(OH)4 COLOR: All colors REFRACTIVE INDEX: 1.624 to 1.644 BIREFRINGENCE: 0.018 to 0.040 SPECIFIC GRAVITY: 3.06 MOHS HARDNESS: 7 to 7.