Prehnite

Main Deposits

Australia (main producer of gem quality), South Africa, Mali, Scotland, and USA

Description and Characteristics

Prehnite is a calcium aluminum silicate typically formed in the cavities of basaltic volcanic rocks. While it can occur in rare tabular crystals, it is most commonly found in botryoidal (grape-like) or reniform (kidney-like) habits. Its most characteristic color is a pale lime green or yellowish-green that possesses an almost supernatural luminous and translucent quality. It is often found associated with Epidote, featuring small black or dark green needles inside that create a fascinating visual contrast.

Chemical Formula	$$Ca₂Al(AlSi₃O₁₀)(OH)₂$$
Luster	Vitreous or pearly
Streak	White
Fracture	Uneven
Cleavage	Good in one direction (basal)
Hardness	6-6,5 Mohs
Crystal System	Orthorhombic

Did you know...?

It is named after Colonel Hendrik von Prehn, who discovered it at the Cape of Good Hope (South Africa) in 1774; this marked a milestone in mineralogy as the first mineral named after a person. In the gemstone market, it is sometimes called "Australian Jade" due to its visual resemblance, though they have no mineralogical relationship. A curious fact is its slight pyroelectricity: it can develop a weak electrical charge when heated, demonstrating its complex internal structure.

New-Age Properties

Prehnite is known as the "stone of unconditional love" and the healing of the healer. It is said to be a stone that "heals the therapist," helping those who care for others to recharge their own energy. It is linked to the heart and solar plexus chakras. Spiritually, it facilitates visualization and deep meditation, allowing contact with higher entities and the inner self. It is an excellent stone for "decluttering," helping to clear mess (both physical and mental) and let go of what is no longer necessary for the soul's growth.