Abstract: This invention provides a computer implemented method to identify a specific gemstone with a known reference point. In one embodiment, said computer implemented method, comprises the steps of: (a) detecting said known reference point from a source image of said specific gemstone; (b) Retrieving one or more reference images of possible gemstones from a gemstone database based on said known reference point; (c) extracting edge features from said source image and said one or more reference images; (d) computing a similarity value by matching said edge features from each of said one or more reference images against said source image; and (e) identifying said specific gemstone from said one or more reference images based on said similarity value.

Abstract: This invention provides a jewelry alloy which improves mechanical properties of AuIn2 while preserving its attractive blue hue. In one embodiment, said mechanical properties comprises fracture toughness and hardness. In one embodiment, said jewelry alloy consist essentially of 43.0 to 49.0 wt % Au; 51.0 to 57.0 wt % In; 0.001 to 1.0 wt % of one or more elements selected from the group consisting of Fe and Ge; and 0.001 to 1.0 wt % of one or more elements selected from the group consisting of Rh, Ir and Ru.

Abstract: This invention relates to a platinum electrodeposition bath which is capable of forming platinum deposits having an attractive shiny granular surface like a velvet, which is particularly useful in jewelry manufacturing. The velvet effect can be illustrated by comparing the surface roughness with a bright smooth platinum deposit.

Abstract: Organo-metallic complexes for opto-electronic and sensory devices and their use in such devices are provided. The organo-metallic complex (triplet emitter) consists of a metal center and chelate ligands. At least one of chelate ligands comprises an aromatic or fused aromatic ring(s). Each ligand is covalently substituted with at least one, preferably two charge transport groups (ctg). The metal center can be coordinated by a spectator ligand. Presence of two ctgs at each ligand is advantageous for applications in organic light emitting diodes (OLEDs). Charge transport units facilitate hole and/or electron transport to the molecular center and allow for efficient exciton formation directly on the complex. Presence of ctgs on each ligand provides good shielding with respect to interactions with the environment. Emission quenching is strongly reduced and materials with high emission quantum yields are obtained.