Gemstone Calibration and Pre-forming Machine
Precision, Repeatability, and Efficiency for Professional Gem Cutting
The Gemstone Calibration and Pre-Forming Machine is a professional lapidary tool designed for precise shaping, calibration, and dome-making on gemstones. With cam-based profiling, a 0–90° swivel for domes and angled pre-forms, dual variable-speed motors, and a spindle limit switch for easy inspection, this machine is ideal for creating consistent calibrated stones and different-shaped cabochons. Built from precision-machined aluminum, brass, and steel, it ensures durability and accuracy, making it perfect for gemstone manufacturers, jewelry producers, workshops, training institutes, and even hobby cutters exploring fancy gemstone shapes.
The Gemstone Calibration and Pre-Forming Machine is a professional-grade lapidary solution designed to simplify gemstone shaping, cabochon dome cutting, and pre-forming for faceting. With advanced engineering and robust materials, it delivers repeatable precision, faster throughput, and ease of operation, making it the perfect choice for gemstone manufacturers, jewelry producers, lapidary workshops, and hobby cutters who want to explore fancy gemstone shapes.
Wide Range of Stone Shapes
This machine can easily create calibrated gemstone shapes that are difficult to achieve by hand, including:
- Standard: Round, Oval, Square, Rectangle
- Fancy: Pear, Marquise, Trillion, Heart
- Complex: Octagon, Hexagon, and custom profiles on request
Perfect Cabochons with Domes
The integrated swivel mechanism allows the mounted stone to tilt from 0° to 90°. This makes it possible to grind parallel or across the lap, create perfect domes on cabochons, and generate angled pre-forms that serve as an ideal base for faceting.
Cam-Based Precision Shaping
The machine uses a master cam and spindle system to replicate gemstone profiles consistently. As the cam rotates, the stone follows its profile, producing uniform, calibrated stones ideal for bulk production. Optional and custom cam shapes are also available.
Dual Variable-Speed Motors
- Main Motor: 250W BLDC motor with variable speed (0–3000 RPM) for the grinding lap
- Spindle Motor: DC motor (0–100 RPM) with limit-switch control for easy stop, inspection, and resume
Precision Adjustment Slides
- Disc Near & Far Adjustment: Controls size and grinding depth
- Disc Left & Right Adjustment: Maximizes lap surface use
- Stone Height Adjustment: Achieve the desired vertical height of the dome
- Dome Shape Adjustment: Fine-tunes cabochon dome shape and angled cuts
Built for Durability
Constructed from aluminum, brass, and high-grade steel, the machine ensures stability and long-term accuracy even under heavy workloads. Precision machining enhances reliability for professional and industrial use.
Efficient Water Cooling
The included submersible pump with inlet and drainage hose provides continuous cooling during grinding, keeping the lap and stones cool, extending disc life, and improving cut quality.
Specifications
| Dimensions (L × W × H) | 650 x 550x 470 mm |
|---|---|
| Lap Diameter | 8 inch |
| Main Motor | BLDC 250 W, variable 0–3000 RPM |
| Spindle Motor | DC, variable 0–100 RPM, limit-switch controlled |
| Electric Supply | 220v or 110V |
| Net Weight | Approx. 35 kg |
Included Accessories
- 5 master cams: Round, Oval, Pear, Marquise, Square (or Choose your own)
- 2 diamond discs: 8" (360# and 600#)
- 1 master lap
- 75 steel dop sticks - Diameter: 2-8mm, Length: 50mm
- Submersible pump with inlet and drainage hose
- Toolkit and power cable
Optional cams available: Heart, Trillion, Octagon, Hexagon, plus custom profiles on request.
Who It’s For
- Gemstone manufacturers & exporters
- Lapidary workshops
- Jewelry producers
- Training institutes
- Hobby cutters exploring fancy cabochon and gemstone shapes
Why Choose This Machine
- Makes different-shaped cabochons with consistent domes
- Replicates complex shapes with cam-based repeatability
- Easy inspection and stone change with the spindle limit switch
Durable, precise, and production-ready
Warranty & Support
- 1-year manufacturer warranty (Does not cover physical damage and consumables).
- Installation and operation support.
- Drop us an email at sales@jewelsntools.com or contact us from the website for any assistance. We’d be quick to respond and glad to help.
International Customers & Shipping
- For International customers, the fees on import duty or customs charges will not be incurred by us. Every country’s customs policies are different and must be considered by the customers on their own.
- Our logistics partners are DHL & FedEx. If any of these have operations in your country, we should be able to ship the products to you.
- The shipping of this faceting machine is insured.
- Time for shipping varies depending on the shipping region, but usually, it takes no more than 10 business days to be delivered anywhere in the world, once it’s dispatched. The dispatch times vary depending on stock availability.