LARGE VIAL - 3.6ml - Refractive Index Liquid =1.80 for Gem Refractometer, Oil, Fluid, Test, Gemstone

Perfect for cost conscious Gem Assayers! 1.800 Refractive Index allows you to use your Gem Refractometer to a very wide range. 1.81 Gem Refractive Index Fluid is better, but WAY more expensive! American Made! These products are made by a NIST certified lab. The other stuff on Amazon is sourced from where exactly? Labeled Bottles. Believe it or not, some Sellers do not supply a label! This Vial contains 3.6ml - 20+Grams of fluid - (7/8's Full Bottle in a 4.0ml Vial). Applicator rod is in cap for easy transfer of product.