What is antigorite?
Antigorite is a serpentine-group mineral and a common component of serpentinite. It forms at higher temperatures than lizardite and chrysotile and can preserve evidence of the hydration and metamorphism of ultramafic rocks.
Mineralogy and structure
Antigorite has the formula Mg3Si2O5(OH)4 and crystallises in the monoclinic system. Mohs hardness is about 3.5-4 and specific gravity is close to 2.5-2.6. Its modular sheet structure can produce a range of polysomatic forms.
Colour and appearance
Green, blue-green, white, brown and black material is known. Antigorite may be platy, fibrous, scaly or massive, with vitreous to silky lustre. Polished material can show attractive mottling and chatoyant-looking surfaces.
Formation and localities
Antigorite forms when magnesium-rich ultramafic rocks react with water during metamorphism. It is widespread in serpentinite belts, including localities in Italy, Greece, Switzerland, Brazil, Canada, New Zealand, Russia and the United States.
Identification and collecting
Record the host serpentinite, texture and associated magnetite, talc or carbonate. Fibrous material should be handled carefully and should not be cut or abraded without appropriate dust control.
Antigorite and zodiac signs
In popular birthstone and zodiac guides, Antigorite is often associated with Scorpio and Virgo. These zodiac crystal associations are part of modern spiritual culture and vary between traditions, countries and individual practitioners. They are not a mineralogical classification and should not be presented as a scientific property of the stone.
Esoteric meaning of Antigorite
Crystal collectors and readers of esoteric symbolism may choose Antigorite for its colour, texture, locality and personal meaning. In crystal healing and meditation traditions, it may be described with themes such as focus, grounding, protection, calm or confidence, depending on the source. These symbolic interpretations can be useful for storytelling and personal reflection, but there is no reliable scientific evidence that a mineral changes health, energy, luck or destiny.
Choosing Antigorite as a birthstone or symbolic crystal
When choosing a Antigorite birthstone, zodiac crystal or spiritual gift, compare the actual specimen: natural colour, crystal habit, transparency, inclusions, locality and condition. A mineral guide is more reliable when symbolic associations are kept separate from tested physical properties and from the description of an individual piece.
