Wardite Value, Price, and Jewelry Information

Rob Lavinsky, iRocks.com – CC-BY-SA-3.0 [CC-BY-SA-3.0], via Wikimedia Commons

Wardite

Wardite is another of the many phosphates that have been cut by collectors. It is pale colored and not terribly attractive and is fairly soft and fragile. It is seen far more frequently as cabochons than as faceted stones.

Wardite Information

Data Value
Name Wardite
Colors Colorless, white, pale green to bluish green.
Crystallography Tetragonal. Crystals pyramidal; as crusts, aggregates, fibers, spherules.
Refractive Index 1.586-1.604
Luster Vitreous.
Hardness 5
Fracture Conchoidal
Specific Gravity 2.81-2.87
Birefringence 0.009
Cleavage Perfect 1 direction
Stone Sizes Faceted gems are very rare, cut from Brazilian material. Cabochons are cut of white wardite mixed with green variscite from Utah. Faceted gems would all be under 2—3 carats in size.
Luminescence None
Luminescence Present No
Transparency Transparent to translucent.
Absorption Spectrum Not diagnostic.
Formula

NaAl3(PO4)2(OH)4 · 2H2O.

Pleochroism

None.

Optics

o = 1.586-1.594; e = 1.595-1.604. Uniaxial (+). Sometimes anomalously biaxial.

Optic Sign Uniaxial +

Occurrence: In phosphate masses in sediments, and in pegmatites.

Keystone, South Dakota; Pala, California.

Fairfield, Utah: in large nodules with variscite and other phosphates. Also at Amatrice Hill, Lucin, Utah.

Montebras, France: as an alteration of amblygonite.

West Andover, New Hampshire: in crystals to 1 cm.

Piedras Lavradas, Paraiba, Brazil: greenish white crystals to about 1 inch.

Comments: Wardite is another of the many phosphates that have been cut by collectors. It is pale colored and not terribly attractive and is fairly soft and fragile. It is seen far more frequently as cabochons than as faceted stones.

Name: After Henry A. Ward, American naturalist and collector.