Device for measuring the salinity of water More accurate and easy to use in the field than a hydrometer Uses light refraction through a lens The light refracts to a greater or lesser degree in different salinities Relatively inexpensive
Optical instrument that measures the percent of soluble solids in solution by the extent which a beam of light is bent (refracted) Soluble solids scale is based on sugar concentration in a pure sucrose solution
A refractometer is a device that measures the refractive index of a gemstone RHODOCHROSITE Rhodochrosite is a mineral whose color ranges from rose to pink to almost yellow or brown Although it is very pretty, this stone is soft and brittle; it is used in jewelry and for carvings and figurines Rhodochrosite is Manganese Carbonate; its chemical formula is MnCO3 Rhodochrosite has a hardness of 3 5 - 4 5 (glass has a hardness of 4) and a specific gravity of 3 5 Rhodochrosite is found in Argentina, Peru, Germany, Mexico, South Africa, Russia, Italy, USA (Colorado and Montana), and Romania Rhodochrosite is not enhanced