Ruby gemstones are ideal for calibrating a spectroscope’s scale. Our basic spectroscope instructions will show you how to do this. A synthetic ruby, like this brilliant-cut stone, is an affordable option for novice gemologists. Photo by James St. John. Licensed under CC By 2.0.
Lab-Created Red Ruby Faceted
Ruby gemstones are ideal for calibrating a spectroscope's scale. Our basic spectroscope instructions will show you how to do this. A synthetic ruby, like this brilliant-cut stone, is an affordable option for novice gemologists. Photo by James St. John. Licensed under CC By 2.0.
Article: Spectroscope Instructions for Novice Gemologists
Credit: James St. John
| Gemstone | Ruby, Corundum |
| Natural or man made | Lab-made |
| Gem State | Faceted |
| Color | Red |
| Transparency | Transparent |