“Laserblue” synthetic glass: 16.04 cts. Photo © Joel E. Arem, PhD, FGA. Used with permission.
Laserblue Information
| Data | Value |
|---|---|
| Name | Laserblue |
| Is a Variety of | Glass |
| Stone Sizes | To very large |
| Heat Sensitivity | Yes |
| Special Care Instructions | This is a rare glass. It is brittle, hard to cut and easy to chip. |
| Identifying Characteristics | Always a pure blue with medium to deep tone. Typical glass inclusions, bubbles and swirl marks. Extraordinary hardness for glass at 6.5 |
| Formula | borosilicate + Cu |
| Colors | Blue |
| Fracture | Conchoidal |
| Hardness | 6.5 |
| Cleavage | None |
| Wearability | Poor |
| Crystallography | Amorphous. |
| Refractive Index | 1.520 |
| Birefringence | None. |
| Dispersion | Low. |
| Luminescence | Intense, strong blue in UV long and short. |
| Luminescence Present | Yes |
| Luminescence Type | Fluorescent, UV-Long, UV-Short |
| UV Long | Intense blue |
| UV Short | Strong blue |
| Absorption Spectrum | Strong line 630 nm general absorption 540 550 nm. |
| Pleochroism | None. |
| Optics | Isotropic. |
| Luster | Vitreous. |
| Polish Luster | Vitreous. |
| Fracture Luster | Vitreous. |
| Specific Gravity | 2.30-4.50 (glass) |
| Enhancements | None. |
| Transparency | Transparent. |
| Phenomena | None. |
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