This specimen exhibits a sharp cross formed from graphite particles that were pushed out of the way during crystal growth. Chiastolite is a variety of the mineral andalusite with the chemical composition al 2 sio 5 it is noted for distinctive cross shaped black inclusions of graphite the presence of the cross caused this mineral be used as a gem.
Chiastolite specimens were distributed throughout europe from the 16th century as an amulet or souvenir provided by the pilgrims returning from santiago de compostela.
Chiastolite gemstone. The diagonal fiber of this specimen is a result of needle like crystals possibly rutile crystals that have grown within the andalusite crystal. The name is derived from the greek word chiastos which means cruciform cross marked or crosswise. Chiastolite is a quite unique deep brown stone with a natural black cross formation in its structure.
Chiastolite is an opaque variety of andalusite. Ancient people revered the cross within it as a sign from god. Chiastolite is from the greek chiastos arranged diagonally because the pattern of carbon inclusions in the gem resembles the greek letter chi which is written x viridine alludes to the viridescent or greenish color of this variety.
The cross patterned chiastolite variety is also used as a minor gemstone and can be cut into rounded disc like slices and polished. 5 out of 5 stars 958 958 reviews. Andalusite gemstones are priced very much like most colored gemstones with color clarity cut and size being the four factors to consider.
One of the alternative names of this charm is cross stone. Andalusite a powerful healing gemstone thursday july 21 2016 written by gemexi posted in gemstone healing. These crystals are often sectioned polished and used as amulets sometimes chiastolite is cut into cabochons tablets.
As we talk according to the tradition of greek andalusite is a variety of chiastolite. Although it forms hard and resistant gemstones of beautiful color deposits of gem quality material are not extensive enough to make andalusite into a standardized gemstone. Andalusite do tend to be quite similar in color earthy brown and green colors but any specimens with a noticeable orange pink or red gleam are more valuable.
When the crystal is cut through its cross section will usually show an off white body colour and a blackish diagonal cross caused by carbonaceous inclusions. Chiastolite is of the andalusite variety that s medium to dark brown in color and often with black or green cross shaped inclusions. A cabochon cut from a specimen of the chiastolite variety of andalusite.
This unusual crystal has long been regarded as a stone that is highly protective. Chiastolite is also known as the cross stone. Andalusite is used a minor gemstone.
Chiastolite gemstone 42 55 cts fancy shape chiastolite cabochon chiastolite pendant stone loose gemstone jewelry making approx 37x24x6 mm overseasgems2018.
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