Minimum size is the measurement of the size of gemstone present in the jewelry.

Every colored gemstone has its own color range, as per hue (The first impression of an object�s basic color), tone (Degree of darkness or lightness of a color) and saturation (A color�s strength or intensity). Color of the gem plays an essential role in determining its value.

Opaque is a clarity grade in which due to the higher number of inclusions, it is impossible to see through the gemstone.

The Mohs scale of hardness is a measurement of a mineral�s hardness against ten reference minerals.

Surface enhancements like lacquering, enameling, inking, foiling, or sputtering of films are standard in jewelry design. Modern gem coatings are indistinguishable from the gemstone-like the coatings that are applied to eyeglass lenses. This enhancement improves the appearance and adds color or other special effects.