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Formula: Ca9B26O34(OH)24Cl4.13H2O
Hydrated borate, triclinic paramorph
of monoclinic ruitenbergite
Crystal System: Triclinic
Specific gravity: 2.22 measured, 2.11 calculated
Hardness: 3 to 4
Streak: White
Colour: Colourless, very pale yellow, orangish
Luminescence: Not fluorescent under UV
Solubility:
Common impurities:
Environments
Localities
At the type locality, the Potash Corporation of the Saskatchewan Mine, Penobsquis, Cardwell Parish, Kings county, New
Brunswick, Canada, most of the borate minerals reported occur in the Middle Halite
member of the evaporite sequence, and include boracite,
colemanite, danburite,
hilgardite, howlite,
hydroboracite, priceite,
szaibelyite, ulexite,
veatchite and volkovskite.
Pringleite, megascopically visible as brightly reflecting cleaved surfaces, and
ruitenbergite are minor constituents in the holotype hand specimen, which
is composed principally of halite and
hilgardite-1A, with minor sylvite
and traces of anhydrite, quartz and
clays.
In the hand specimen, pringleite has been observed as colourless to orange, platy, subhedral to anhedral, brightly
reflecting cleaved aggregates up to 4 mm in size, in and around rosettes of white opaque
hilgardite-1A, and also associated with dull orange massive
halite. The cleavage planes of pringleite are, in tum, the host for
numerous small inclusions of hilgardite-14. Individual crystals of
pringleite are up to 2 mm in size, and platy to prismatic
(CM 31.4.795-800).
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