A species of Garnet Group, Also known as Almandite, Adelaide Ruby, Alabandine Ruby, Carbuncle, Greenlandite, Pyralspite
The beautifully rich color of almandine Garnet is an excellent clue that it is part of the garnet family. It can be found globally and is often used in jewelry and other decorative objects. When ground down, it is used to create very special sandpaper called "garnet paper." Surprisingly, the discovery of one of the largest specimens of this mineral was in midtown Manhatten!
Semi-precious gemstone
Hardness:
7 - 7.5
Density:
4.313 g/cm³
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Properties
Values
Market Price
How to Care
Real vs Fake
Characteristics
Cultural
Common Questions
General Info About Almandine Garnet
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Physical Properties of Almandine Garnet
Luster
Vitreous, Resinous
Diaphaneity
Transparent to translucent
Colors
Deep red, brownish red, red-violet, black
Magnetism
Non-magnetic
Tenacity
Brittle
Cleavage
None
Fracture
Conchoidal
Streak
White
Crystal System
Isometric
Hardness
7 - 7.5 , Extremely hard
Density
4.313 g/cm³, Obviously Heavy Weight
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Chemical Properties of Almandine Garnet
Chemical Classification
Silicates
Formula
Fe2+3Al2(SiO4)3
Elements listed
Al, Fe, O, Si
Common Impurities
None
Optical Properties of Almandine Garnet
Refractive Index
1.770-1.820
Pleochroism
None
Dispersion
0.027
Optical Character
Isotropic
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Rarity
Easy to obtain
Collection Recommendation
4.0 out of 5
Popularity
3.8
Aesthetic
4.2
Rarity
3.7
Sci-Cultural Value
3.9
The Market Price of Almandine Garnet
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Rough/Tumbled Price
Smaller Than Hand (0-1.5in)
$3 - $20
Close Hand (1.5-3in)
$20 - $70
Equal To Hand (3-6in)
$70 - $120
Bigger Than Hand (>6in)
$120
How to Care for Almandine Garnet?
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Durability
Durable
Scratch resistance
Good
Toughness of Almandine Garnet
Poor
Fair
Good
Excellent
Almandine Garnet possesses good toughness due to its lack of cleavage and compact crystal structure, enabling it to withstand everyday impacts without fracturing easily.
Stability of Almandine Garnet
Sensitive
Stable
Almandine Garnet is considered stable for daily use due to its resistance to water, sunlight, and dry conditions. It requires caution with heat and strong chemicals but generally maintains its appearance well with regular wear and care.
More Care Tips of Almandine Garnet
Real vs Fake Almandine Garnet
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4 Ways to Tell if almandine Garnet is Real
Fake Alert Level:
Caution Needed
Materials like Glass and plastic are sometimes mistakenly sold as natural almandine Garnet. It's advisable to buy from reputable retailers and, if possible, request a certificate from a gem testing laboratory for authentication. Here are some handy tips to help you initially discern the authenticity of almandine Garnet.
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Formation of Almandine Garnet
Almandine occurs rather abundantly in the gem-gravels of Sri Lanka, whence it has sometimes been called Ceylon-ruby. When the color inclines to a violet tint, the stone is often called Syriam garnet, a name said to be taken from Syriam, an ancient town of Pegu (now part of Myanmar). Large deposits of fine almandine-garnets were found, some years ago, in the Northern Territory of Australia, and were at first taken for rubies and thus they were known in trade for some time afterwards as Australian rubies. Almandine is widely distributed. Fine rhombic dodecahedra occur in the schistose rocks of the Zillertal, in Tyrol, and are sometimes cut and polished. An almandine in which the ferrous oxide is replaced partly by magnesia is found at Luisenfeld in German East Africa. In the United States there are many localities which yield almandine. Fine crystals of almandine embedded in mica-schist occur near Wrangell in Alaska. The coarse varieties of almandine are often crushed for use as an abrasive agent.
Cultural Significance of Almandine Garnet
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Uses of Almandine Garnet
Almandine Garnet is the hardest garnet, and so is used for abrasive applications, like sandpaper. The properties of this stone make it perfect for sanding wood. It is also used for sand-blasting, waterjet cutting, and filtration, since its fine grains can be used to keep out contaminated material.
The Meaning of Almandine Garnet
Almandine Garnet is the state gemstone of Connecticut and the traditional birthstone for January babies. Almandine Garnet was worn as a stone for protection by the Crusaders and considered a defence against poison during ancient times. It was also believed that if a wise man dreamt of this stone, they would wake with the answers to all of their life's mysteries.
Etymology of Almandine Garnet
Almandine (/ˈælməndɪn/), also known as almandite, is a species of mineral belonging to the garnet group. The name is a corruption of alabandicus, which is the name applied by Pliny the Elder to a stone found or worked at Alabanda, a town in Caria in Asia Minor.
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