Gem Portable Refractometer, RHG181 1.30-1.81 Presidium Gemstone ldentification Tester for Jewelry, Gold & Silver and Diamond, Lab Refractometers
| Country | USA |
| Brand | Lonely Planet |
| Manufacturer | Lonely Planet |
| Binding | Kindle Edition |
| ReleaseDate | 2018-03-20 |
| Format | Kindle eBook |