Irradiation and color modification of gemstones - blue topaz, morganite, heliodor and prasiolite for the jewelry industry
Gunter Meelis GmbH & Co. KG
Idar-ObersteinNew on Amplifa
About Gunter Meelis GmbH & Co. KG
Gunter Meelis GmbH & Co. KG specializes in the irradiation and color modification of gemstones. The company in Idar-Oberstein treats topaz submitted by customers in the blue topaz shades Sky Blue, Swiss Blue and London Blue, as well as beryl (morganite, yellow and pink) and quartz (prasiolite, green). In addition to color modification, the company offers the selection of rough stones through to cut and polished stones. Irradiated stones are tested by individual stone measurement with regard to NRC requirements and the international standard; an automated measuring machine with four sodium iodide measuring stations is available for this purpose. The company holds an EU import and export license for irradiated gemstones as well as a US NRC License for the import and distribution of irradiated gemstones in the USA, and takes care of the transport, handling and storage of radioactive material. Customers come from the jewelry industry and the gemstone trade worldwide.
- Site
- Idar-Oberstein
- Processes
- Irradiation of gemstones / color modification (London Blue, Swiss Blue, Sky Blue), Rough stone selection and cutting/polishing of gemstones, Automated radiation measurement (individual stone measurement, NRC requirements, 74 Bq/gr), Irradiation/color modification of gemstones (topaz, beryl/morganite, quartz), Selection of rough stones, Automated individual stone measurement of radioactive radiation values, Handling and storage of radioactive material, Export/import of irradiated gemstones
- Materials
- Topaz / Blue Topaz, Beryl (morganite, heliodor), Quartz (prasiolite), Beryl (Morganite, Heliodor), Quartz (Prasiolite)
- Certificates
- US NRC License (import and distribution of irradiated gemstones in the USA), EU import & export license for irradiated gemstones, US NRC License (import and distribution of irradiated gemstones, USA), Individual stone measurement according to NRC requirements, Testing according to international standard (74 Bq/g)
- Industries
- Jewelry industry, Gemstone trade
- 01
Rough stone selection
- 02
Cutting and polishing of stones
- 03
Irradiation/color modification
- 04
Automated individual stone measurement of radiation values
- 05
Handling and storage
- 06
Export/import and distribution
Gemstones and treatment processes
Topaz / Blue Topaz
Irradiated in the shades Sky Blue, Swiss Blue and London Blue and offered in all sizes and shapes for the jewelry industry.
Beryl (Morganite, Heliodor)
Color modification of beryl to yellow and pink (morganite) as well as heliodor.
Quartz (Prasiolite)
Color modification of quartz to green (prasiolite).
Locations
Idar-Oberstein
DEOffice and production facility (irradiation, measurement)
- Materials
- Topaz, Beryl, Quartz
- Automated radiation measuring machine with 4 measuring stations (sodium iodide detectors)
Gemstones
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Irradiation of gemstones / color modification (London Blue, Swiss Blue, Sky Blue)Surface | – | – | – | – | Topaz (blue topaz), Beryl (morganite, heliodor), Quartz (prasiolite) |
| Rough stone selection and cutting/polishing of gemstonesEngineering | – | – | – | – | Topaz, Beryl, Quartz |
| Automated radiation measurement (individual stone measurement, NRC requirements, 74 Bq/gr)Testing | – | – | – | – | Topaz (blue topaz) |
1 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Automated radiation measuring machine with 4 measuring stations (sodium iodide detectors) | – | 1 | – | – | Idar-Oberstein |
Additional services
Quality and licenses
Irradiated stones are tested for radiation values by individual stone measurement - in accordance with NRC requirements and the international standard (74 Bq/g). The automated measuring machine with four sodium iodide measuring stations performs test measurements on each individual stone at the end of the conveyor belt.
| Evidence | Idar-Oberstein |
|---|---|
| US NRC License (import and distribution of irradiated gemstones, USA) | |
| EU import & export license for irradiated gemstones | |
| Individual stone measurement according to NRC requirements | |
| Testing according to international standard (74 Bq/g) |
History
More than 30 years of experience in the selection of rough stones and color modification of gemstones (according to company information, without year specification)