Glass Sapphire

Glass

Glass is an amorphous (non-crystalline) solid. Because it is often transparent and chemically inert, glass has found widespread practical, technological, and decorative use in window panes, tableware, and optics. Some common objects made of glass are named after the material, e.g., a "glass" for drinking, "glasses" for vision correction, and a "magnifying glass".

Sapphire

Sapphire is a gemstone variety of the mineral corundum, the crystalline form of aluminium oxide (α-Al2O3). Pure corundum is colorless, while trace elements in its crystal structure produce a wide range of colors. Blue is the best-known, but sapphires also occur in yellow, green, purple, pink, orange, gray, black, and colorless forms. Red gem-quality corundum is classified as ruby rather than sapphire. The boundary between ruby and pink sapphire is based on color appearance and varies among gemological and trade conventions. Sapphire has a Mohs hardness of 9, making it highly resistant to scratching and abrasion.

Shades of blue

Varieties of the color blue may differ in hue, chroma, or lightness, or in two or three of these qualities. Variations in value are also called tints and shades, a tint being a blue or other hue mixed with white, a shade being mixed with black. A large selection of these colors is shown below.

glass

Noun

1. An amorphous solid, often transparent substance, usually made by melting silica sand with various additives (for most purposes, a mixture of soda, potash and lime is added).
2. Any amorphous solid (one without a regular crystal lattice).

Verb

1. To fit with glass; to glaze.
2. To enclose in glass.

sapphire

Noun

1. A clear deep blue variety of corundum, valued as a precious stone.
2. A white, yellow, or purple variety of corundum, either clear or translucent.

Adjective

1. of a deep blue colour.
2. pertaining to a 45th year