ruby ring 3D print model

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This article centers around the mineral or gem. For other uses, see Ruby (disambiguation). Ruby Corundum-winza-17d.jpg Natural ruby crystals from Winza, Tanzania The Details Classification Variety of Oxide Mineral Formula Combination of aluminum oxide and chromium: Al2O3:Cr Properties Crystal Structure Trigonal Crystal Class Hexagonal Scalenohedral (3m) Symbol: (3 2/m) Space Group R3c Distinctive Features Color Widespread spectrum of red hues, ranging from pink to crimson Crystal Formation Terminated Tabular Hexagonal Prisms Cleavage None Detected Fracture Combination of Conchoidal and Splintery Tenacity Brittle in Nature Hardness on Mohs Scale: 9.0 Luster Varied, featuring Subadamantine, Vitreous, and Pearly Attributes Optical Properties Transparency: Visible, Translucent Density: Specific Gravity of 3.97-4.05 A ruby is a colorful gemstone, classified as a pink to deep red variant of the mineral corundum (aluminum oxide). Known varieties include sapphires. Alongside amethyst, sapphire, emerald, and diamond, it constitutes one of four cardinal gems. Origin The term "ruby" originates from ruber, Latin for 'red'. The vibrant color is caused by chromium content. Notable Cases Spinel varieties formerly known as Balas rubies are no longer considered true rubies. Determination of Quality Value assessments focus on a combination of characteristics, prioritized in order of importance: color, cut, clarity, and weight. The value is heavily influenced by carat weight. Brighter and deeper hues often command premium prices, specifically the shade known as "blood-red" or "pigeon blood". The level of transparency has significant influence, similar to diamonds; yet a lack of needle-like inclusions may imply that treatment has been applied. Traditionally designated birthstone for July, ruby appears more pink than garnet but has certain variations among rhodolite garnets sharing similarities.