| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| False diamond | Mining | Any colorless mineral that if cut and polished makes a brilliant gem; e.g., zircon, corundum, and topaz. Having less dispersion, lower refractive index, and birefringence, they are easily distinguished from diamond. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
