Gem-Master 1.81 refractive index liquid (10gm). Produced solely for use in gemological refractometry, as an optical contact liquid. For use only by qualified gemologists, or students under supervision, in a suitably appointed laboratory or workplace. This liquid is used with gemstone refractometers as a contact medium for the identification of gemstones. It creates a film between the hemicylinder of the refractometer and the gemstone allowing for an accurate reading. The ensure the liquids maximum shelf life keep the container tightly sealed after opening, store it away from direct light and in moderate temperatures. This Item is Non-Returnable.

Caution: Use only in a well-ventilated area. This material can be harmful if ingested, inhaled, or absorbed through skin contact. The use of eye protection and protective clothing is recommended. Due to federal regulations this item cannot be shipped to a Post Office Box. Any unused portion must be disposed of in accordance with local, state, and federal regulations governing chemical substances. This product contains methylene iodide and tetraiodoethylene. Safety: refer to detained information sheet inside box. This Item is Non-Refundable.