Presidium Refractive Index Meter II

Revolutionize your gemstone identification process and say goodbye to messy, toxic refractive index liquids. The Presidium Refractive Index Meter II (PRIM II) is a state-of-the-art digital desktop tester that instantly measures the amount of light reflected through a stone to determine its Refractive Index (R.I.). Unlike traditional refractometers that max out around 1.81, the PRIM II boasts an massive testing range of 1.000 to ~3.000, allowing you to easily separate diamonds, moissanites, and high-zircon simulants in seconds.

Key Features & Benefits

• Clean, Liquid-Free Testing: Performs fast and accurate readings on flat, polished surfaces without the inconvenience, mess, and recurring cost of R.I. contact liquids.

• Extended R.I. Range (1.000 – 3.000): Covers the entire spectrum of commonly known market gemstones, including high-index stones like diamonds, synthetic moissanite, strontium titanate, and G.G.G. that traditional refractometers simply cannot read.

• Smart Digital Interface: Instantly displays direct R.I. readings on a clear LED digital panel. A blackout interior cover cup ensures absolute accuracy by blocking ambient light interference.

• Comprehensive PC Software: Includes a downloadable program featuring a database of over 50 gemstones. Input your known variables (R.I., color, hardness, S.G.) to systematically eliminate possibilities and confidently identify the stone.

• Built-In Bench Conveniences: Features an integrated 8-piece gemstone holder for sorting, and a convenient pocket-sized pull-out R.I. chart with reference readings for 55 common stones.