Dumortierite is a stone named after French scientist and fossil hunter Eugène Dumortier, who discovered it in France’s Rhône-Alps region in the early 1880s. Often a dark blue in color, it is very popular stone for use in carving ornamental gemstones and jewelry.dumortierite is mined for the production of spark plug ceramics to provide electric insulation and to make porcelain. It is sometimes mistaken for other rocks such as lapis lazuli and sodalite.
Hardness:
7 - 8
Density:
3.45 g/cm³
On This Page
Properties
Values
Market Price
How to Care
Characteristics
Cultural
Common Questions
General Info About Dumortierite
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Physical Properties of Dumortierite
Luster
Vitreous
Diaphaneity
Translucent
Colors
Blue, greenish-blue, violet-blue, pale blue, pink, red
Magnetism
Non-magnetic
Tenacity
Brittle
Cleavage
Good
Fracture
Conchoidal
Streak
White
Crystal System
Orthorhombic
Hardness
7 - 8 , Extremely hard
Density
3.45 g/cm³, Normal Weight
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Chemical Properties of Dumortierite
Chemical Classification
Silicates
Formula
Al(Al2O)(Al2O)2(SiO4)3(BO3)
Elements listed
Al, B, O, Si
Common Impurities
Fe,Ti,Mg,Ca
Optical Properties of Dumortierite
Refractive Index
1.669-1.723
Birefringence
0.011-0.037
Pleochroism
Red-brown crystals - strong trichroism: black, red brown, brown
Optical Character
Biaxial negative
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Rarity
Uncommon
Collection Recommendation
4 out of 5
Popularity
3.7
Aesthetic
4
Rarity
4
Sci-Cultural Value
3.9
The Market Price of Dumortierite
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Color and weight are the decisive factors that affect the price of dumortierite. At about 2.5 cm across, the price of a tumbled stone of average quality is usually $2-$7/piece.
Rough/Tumbled Price
Smaller Than Hand (0-1.5in)
$2 - $25
Close Hand (1.5-3in)
$25 - $70
Equal To Hand (3-6in)
$70 - $150
Bigger Than Hand (>6in)
$150
How to Care for Dumortierite?
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Durability
Durable
Scratch resistance
Good
Toughness of Dumortierite
Poor
Fair
Good
Excellent
Dumortierite has good toughness, making it resistant to damage like chipping or cracking, suitable for daily use. Its internal structure lacks perfect cleavage, which contributes to its durability.
Stability of Dumortierite
Sensitive
Stable
Dumortierite demonstrates resilience under various conditions such as water immersion, sunlight exposure, and dry environments. It maintains appearance well against stains but should avoid high heat and harsh chemicals for optimal preservation.
More Care Tips of Dumortierite
Characteristics of Dumortierite
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Cultural Significance of Dumortierite
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Uses of Dumortierite
Industrially, dumortierite is used in only in the manufacture of high grade porcelain. It is a fairly popular collector's item and ornamental stone, often found in the form of tumbled stone. The blue varieties have been used as an imitation of Lapis lazuli.
Healing Properties of Dumortierite
Dumortierite is believed to enhance mental capacity and memory recall. It is a beneficial stone to use when studying as it might help the mind retain information. It helps its user to accept certain life changes and to learn patience. Many people meditate with it to enhance psychic or spiritual abilities.
Chakras
Third Eye, Crown
Common Questions People Also Ask
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