Description
Natural Ruby Mineral Specimen – Corundum Crystal from Madagascar
This natural Ruby mineral specimen originates from Madagascar, one of the world’s well-known sources of high-quality corundum crystals. Ruby is the red variety of the mineral corundum and is recognised for its vivid colour, exceptional hardness, and importance both as a gemstone and as a collectible mineral specimen.
The crystal shown in the photographs is the exact specimen you will receive. Each piece is individually selected for its natural colour and mineral character. This specimen includes a Certificate of Authenticity lifetime guarantee generic card confirming that the crystal is a genuine mineral.
Please refer to the photographs for full sizing and scale.
Mineral Identification and Crystal System
Ruby is the red variety of corundum, an aluminium oxide mineral with the chemical formula Al₂O₃. Corundum crystallises within the trigonal crystal system and forms prismatic or barrel-shaped crystals, although many specimens occur as irregular crystal fragments or embedded within host rock.
The distinctive red colour of ruby is caused primarily by trace amounts of chromium replacing aluminium atoms within the crystal lattice. This trace element absorption produces the vibrant red tones for which ruby is known. Colour intensity may range from pale pinkish-red through deep crimson depending on chromium concentration and geological conditions during formation.
Corundum ranks 9 on the Mohs hardness scale, making it one of the hardest naturally occurring minerals, second only to diamond. This durability contributes to ruby’s long-standing importance both as a gemstone and as a durable mineral specimen.
Colour and Optical Characteristics
Natural ruby specimens often display a range of red tones including raspberry red, purplish red, and deep crimson hues. Some crystals may exhibit internal inclusions or growth patterns formed during the crystal’s geological development.
Under certain lighting conditions, ruby crystals may show subtle fluorescence due to the chromium content within the crystal structure. This effect is a natural property of many ruby specimens and contributes to their visual appeal when illuminated.
Natural ruby specimens may also display internal mineral inclusions such as rutile needles, which are commonly referred to as “silk” within corundum. These inclusions provide valuable geological information about the conditions under which the crystal formed.
Geological Formation
Ruby typically forms within metamorphic rock environments where aluminium-rich minerals are subjected to high temperature and pressure conditions. During metamorphism, aluminium and oxygen combine to form corundum crystals within the host rock.
In Madagascar, ruby deposits are often associated with metamorphic terrains including marble-hosted and basalt-related deposits. These geological settings allow chromium-bearing fluids to interact with aluminium-rich minerals, producing ruby crystals during the crystallisation process.
Madagascar has become an important source of ruby and other gemstone minerals due to its complex geological history and diverse mineral-bearing formations. Many ruby crystals from this region occur as individual mineral specimens or as crystals embedded within metamorphic host rock.
Collecting and Mineral Display
Ruby is highly valued among mineral collectors due to its geological significance, striking colour, and relationship to the broader corundum mineral family. Natural ruby specimens are often displayed in mineral cabinets, gemstone collections, or geological displays alongside other corundum varieties such as sapphire.
The deep red tones and natural crystal surfaces make ruby an attractive display piece for collectors interested in mineralogy, crystallography, or gemstone formation processes.
In various cultural traditions, ruby has historically been symbolically associated with vitality, strength, and passion due to its intense red colour. These interpretations are cultural perspectives rather than scientifically established properties of the mineral.
Authenticity and Presentation
• Genuine natural Ruby mineral specimen from Madagascar
• Corundum crystal composed of aluminium oxide (Al₂O₃)
• Natural red colour produced by chromium trace elements
• Carefully selected specimen with photographs showing the exact crystal you will receive
• Includes a Certificate of Authenticity lifetime guarantee generic card
As a natural mineral specimen, each ruby displays unique colour tones, internal inclusions, and surface textures typical of genuine corundum crystals. Please review the photographs to view the individual characteristics and full size of the specimen available.
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