ETYMOLOGY: Comes from the Greek helios = sun and trepein = to turn.
CRYSTAL SYSTEM: Trigonal.
PRINCIPLE OF FORMATION: Secondary.
CLASS MINERAL: Oxides, quartz group.
CHEMICAL FORMULA, MINERAL ELEMENTS: SiO2 + Al, Fe, Mg, OH, Si.
HARDNESS: 7 on the Mohs scale.
FIELDS: Australia, Brazil, China, Czech Republic, Russia, India.
MINERALOGY: The Heliotrope is a variety of chalcedony (cryptocrystalline which is a mixture of quartz and moganite monoclinic polymorph). It is green chalcedony with red inclusions of iron oxide or red jasper.
MYTHOLOGY: The Heliotrope was used by medieval christians who used to carve this stone scenes of the crucifixion and martyrs, which led to it was also called the stone of the martyrs, Red inclusions seem bloodstains, so English mineral receives the name bloodstone, heliotrope name (Greek ήλιος helios, sun, τρέπειν trepein turn) is derived from several old notions about the way in which the mineral reflects light.
PROPERTIES: It is said that heliotrope helps protect, to limit and reject undesirable influences, calm in cases of aggression, help us adapt to unforeseen situations and maintain control in any situation, stimulates the activity of sleep.
ZODIAC SIGN: Scorpio, Pisces.
USES: Jewellery, meditation, collection, is used in India as a fine powder of bloodthirsty as medicine and as an aphrodisiac.