Presidium Gemstone Computer Gauge

Appraise your mounted jewelry without destroying it. Want to know the exact carat weight or identity of a stone, but it’s already securely set in a vintage ring? Don't risk breaking the prongs! The Presidium Gemstone Computer Gauge (PGCG) is an incredibly advanced digital tool that does the complex math for you. It measures your gemstones with pinpoint precision and uses an internal database to automatically calculate their carat weight and estimate their identity—all without ever removing the stone from its setting.

Product Specifications

• Measurement Range: 0.0 to 25.0mm

• Ultra-Precision Accuracy: 0.01mm increments (Accurate to 2 decimal places)

• Manufacturing Tolerance: strictly 0.02mm

• Digital Display: Instantly switches between Millimeters (mm) and Carats (ct)

• Supported Cuts: Automatically estimates carat weight for 9 different popular gemstone cuts.

• Built-in Database: Able to estimate the identity of 74 different gemstones internally.

• Included Software: Lists Specific Gravity (S.G.), Refractive Index (R.I.), and hardness measurements for 133 common gemstones.

• Connectivity: USB interface for seamless PC data export.

Why You’ll Love It

• The "No-Dismount" Miracle: Save your jewelry from damage. Simply measure the stone while it's still in the ring! This smart gauge instantly calculates the estimated carat weight for 9 different popular gemstone cuts (not just round brilliants!).

• Your Personal Gem Detective: Wondering what stone you actually have? Input the weight and measurements, and the gauge’s built-in computer will use its Specific Gravity (S.G.) database to help you identify up to 74 different types of gemstones.

• PC Connectivity for Easy Records: Tech-savvy collectors will love this. Connect the gauge to your computer via USB to instantly import, save, and print your measurement records to catalog your entire jewelry collection.

• Tackle Tricky Vintage Settings: Got a diamond stuck in a tall, complex vintage setting? This gauge includes a special high-setting attachment so you can easily reach and accurately measure mounted stones.

• Smart Power Saving: Never worry about dead batteries. It features an automatic 10-minute idle shut-off, plus a brilliant auto-magnetic shut-off the second you place it back in its carrying case.