Presentation :

Names) : 

• Dumortierite.

Etymology: 

• Obsidian: Named after the Roman Obsius supposed to have discovered this stone in Ethiopia.

Group, Family: 

• Silicates.

Color : 

• Blue, greenish blue, violet blue, pale blue, pink, red .

Chandelier: 

• Glassy to dull.

Origin : 

• France (Lyon), Poland, Sri Lanka, Africa, Madagascar, Namibia, Peru, Brazil, Bolivia, etc.

Crystal system: 

• Orthorhombic .

Chemical composition : 

• Al(Al ₂ O)(Al ₂ O) ₂ (SiO ₄ ) ₃ (BO ₃ )
  The given formula is the anhydrous end member. The incorporation of hydrogen leads to a more complex formula:
  
  (Al,◻)[Al ₂ (O,OH)](Al ₂ O) ₂ [SiO ₃ (O,OH)] ₃ (BO ₃ ).

Transparency: 

• Translucent to Opaque.

Density : 

• 3.21 to 3.41.

Hardness : 

• 7 to 8.

Cleavage: 

• Perfect .

Breakage: 

• Conchoidal .

Line color: 

• Blue (massive variety) .

Shock resistance:

• Fragile.

Heat resistance:

• Does not melt but whitens.

Properties and virtues:

Physical virtues:

• Helps reduce inflammation in the body.
• acts on the ENT sphere as well as the Thyroid gland.
  
• Regulates skin disorders.
• Relieves migraines.
• Stimulates and strengthens the body and the immune system.
• Promotes digestion by alleviating nausea, vomiting, diarrhea and gallbladder problems.

Psychological, emotional and mental virtues:

• Promotes concentration and calming of the mind and stimulates memory.
• Helps to unblock problems related to communication and verbal exchanges by greatly promoting expression.
• Drives away primary anxieties and fears and brings greater self-confidence.
• Ideal for shy, insecure and introverted people.
• Acts on the ego by allowing work on oneself in order to regulate its echo on the right frequency.
• Promotes discernment as well as intuition.
• Treats and calms self-destructive behaviors and thoughts.

Spiritual virtues:

• Promotes connection to higher planes, guides, angels and the divine plan.

Chakras:

• Throat chakra, 5th chakra.

Cleaning, recharging, reprogramming:

• Cleaning with clear spring water or filtered water (never salt in the water. Salt alters the structure of the mineral and the abyss). Soak the mineral overnight in an unmarked glass container, and then take it out in the morning to rinse it with new spring or filtered water.
• Direct recharge on a crystal or amethyst druse, in a crystal or amethyst geode. You can also place a dozen laser or rock crystals in a circle (like a time dial), points toward the center, and place your minerals in the center to recharge them. Another method, place your minerals in a singing bowl: Tibetan or crystal bowl, (on a cotton cloth to avoid bowl/mineral vibrations), then ring the bowl to fill your minerals with this sound energy. Last method, place your minerals on a disc (wood or mineral) engraved with the flower of life or the seal of Solomon or any other forms of sacred geometry.
• Reprogramming: Reprogramming consists not of telling your mineral what it should or should not do, but of putting the mineral in resonate with you to ask him to do what he needs to do, for you. Reprogramming must be done after each cleaning and must remain simple. Example of reprogramming: "I ask this mineral to bring me all the virtues and benefits on different levels, for my greatest good as well as for the greatest good of the people around me."