Luminescent glass composition
AssigneeD. Swarovski & Co.
InventorsRoy Debbage, Rainer Haid, Helmut Judmaier, Johannes Maier, Florian Meissl, Gerold Sprachmann
Life of this patent
Estimating the term…
Abstract
The invention relates to faceted gemstones based on a luminescent glass composition that contains particular oxides of rare earth metals and thus enables the faceted gemstones to be identified, and to a process for identifying the gemstones.
Claims10
A faceted gemstone of glass containing at least one dopant selected from the group of oxides of the rare earth metals scandium, lanthanum, cerium, praseodymium, samarium, europium, yttrium, terbium, dysprosium, holmium, thulium, ytterbium and lutetium, characterized in that the total amount of the oxides of rare earth metals is 2-2000 mg/kg of the glass composition, said glass comprising the following components:
- (a) 35 to 85% by weight SiO2;
- (b) 0 to 20% by weight K2O;
- (c) 0 to 20% by weight Na2O;
- (d) 0 to 5% by weight Li2O;
- (e) 0 to 13% by weight ZnO;
- (f) 0 to 11% by weight CaO;
- (g) 0 to 7% by weight MgO;
- (h) 0 to 10% by weight BaO;
- (i) 0 to 4% by weight A12O3;
- (j) 0 to 2% by weight ZrO2;
- (k) 0 to 6% by weight B2O3;
- (l) 0 to 3% by weight F;
- (m) 0 to 2.5% by weight Cl;
- the stated amounts summing up to 100% by weight.
A faceted gemstone of glass containing at least one dopant selected from the group of oxides of the rare earth metals scandium, lanthanum, cerium, praseodymium, samarium, europium, yttrium, terbium, dysprosium, holmium, thulium, ytterbium and lutetium, characterized in that the total amount of the oxides of rare earth metals is 2-2000 mg/kg of the glass composition, said glass comprising the following components:
- (a) 30 to 95% by weight B2O3;
- (b) 0 to 20% by weight K2O;
- (c) 0 to 25% by weight Na2O;
- (d) 0 to 5% by weight Li2O;
- (e) 0 to 13% by weight ZnO;
- (f) 0 to 11% by weight CaO;
- (g) 0 to 7% by weight MgO;
- (h) 0 to 10% by weight BaO;
- (i) 0 to 4% by weight A12O3;
- (j) 0 to 5% by weight ZrO2;
- (k) 0 to 3% by weight F;
- (1) 0 to 2.5% by weight Cl;
- the stated amounts summing up to 100% by weight.
A faceted gemstone of glass containing at least one dopant selected from the group of oxides of the rare earth metals scandium, lanthanum, cerium, praseodymium, samarium, europium, yttrium, terbium, dysprosium, holmium, thulium, ytterbium and lutetium, characterized in that the total amount of the oxides of rare earth metals is 2-2000 mg/kg of the glass composition, said glass comprising the following components:
- (a) 30 to 95% by weight P2O5;
- (b) 0 to 30% by weight K2O;
- (c) 0 to 30% by weight Na2O;
- (d) 0 to 10% by weight Li2O;
- (e) 0 to 20% by weight ZnO;
- (f) 0 to 20% by weight CaO;
- (g) 0 to 15% by weight MgO;
- (h) 0 to 30% by weight BaO;
- (i) 0 to 15% by weight A12O3;
- (j) 0 to 15% by weight SiO2;
- (k) 0 to 15% by weight B2O3;
- (l) 0 to 20% by weight BaO;
- the stated amounts summing up to 100% by weight.
Dependencies are inferred from the claim text.