About this stone
Color
BlueGoldBrownRedMulti-Color (storm pattern)
Origin
NamibiaChina (Henan)
Mohs hardness
6.5–7
Treatment categories
Natural
Industry-standard treatment
Typically untreated. Its chatoyant 'storm' pattern comes from naturally occurring fibrous crocidolite within a quartz matrix.
Mineral chemistry
Brecciated tectonic aggregate of hawk's eye and tiger's eye fibers (crocidolite) embedded in a silica/quartz matrix
Crystal system
Trigonal (host quartz)
Stone family
Quartz (chatoyant variety)
Common cuts
RoundFaceted RoundCoinRondelleCabochon
Common sizes
4mm6mm8mm10mm12mm
Care notes
Durable (Mohs 6.5–7). Mild soap and soft cloth; ultrasonic generally safe but avoid prolonged heat which can dull the chatoyancy. Genuine pietersite is scarce — confirm origin (Namibia or China) on higher-priced strands.
Related stones
Tiger Eye, Hawk's Eye, Quartz, Falcon's Eye
Frequently asked questions
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What's the difference between pietersite and tiger eye?
Both are chatoyant quartz with fibrous crocidolite inclusions, but tiger eye shows parallel fibers in continuous gold or blue bands. Pietersite is brecciated — tectonic activity fractured and recemented the fibers at varied angles, producing the swirling 'storm' pattern with multiple chatoyant directions and mixed blue, gold, red, and brown zones in a single stone. -
Where does pietersite come from?
Dakota stocks pietersite from the two known commercial deposits: Namibia (discovered by Sid Pieters in 1962, generally bluer and more storm-like) and Henan Province, China (often redder and browner). Both are genuine pietersite. Namibian material is scarcer and typically commands higher prices, so confirm origin before buying on premium-priced strands. -
Is pietersite dyed or treated?
Pietersite is typically untreated — the storm pattern and color range come from naturally occurring crocidolite fibers within a quartz matrix. The variation in a single strand is geological, not enhancement. Treatment status can still vary by supplier, so ask before buying if not specified. -
How durable is pietersite for jewelry?
At Mohs 6.5–7 (host quartz), pietersite is durable enough for bracelets, earrings, and necklaces with normal wear. Clean with mild soap and a soft cloth. Ultrasonic cleaning is generally safe, but avoid prolonged heat or steam — sustained high temperatures can dull the chatoyant sheen by altering the fibrous inclusions. -
What sizes and cuts of pietersite does Dakota stock?
Current stock centers on 4mm, 6mm, 8mm, 10mm, and 12mm rounds, with cubes, faceted cubes, table-cut cubes, rondelles, tubes (6x13mm), and chip strands also available. Loose cabochons are stocked for bezel-set and wire-wrapped work where the storm pattern reads best on a flat polished face.