Celestite

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Celestite, also called celestine, is named for the Latin coelestis, meaning "heavenly," in reference to its often sky-blue color. This unique gem often forms beautiful transparent to blue tabular crystals, but it can also be colorless, white, light red, green, blue or brown.

Celestite Rough
Celestite Classification
Common Name Celestite
Species Celestite
Celestite Optical Properties
Transparency Transparent - Translucent
Dispersion Strength: None
Refractive Index 1.619-1.635
Birefringence 0.010- 0.012
Optic Character Biaxial
Optic Sign Positive
Polariscope Reaction Doubly Refractive (DR)
Fluorescence SWUV: Inert to weak display same as bodycolorMight phosphoresce
LWUV: Inert to weak display same as bodycolorMight phosphoresce
Pleochroism Trichroic, unobservable or weak, varying shades of body color
Celestite Characteristic Physical Properties
Hardness 3-3.5
Streak White
Specific Gravity 3.970-4.000
Toughness Poor
Inclusions Celestite is a rare mineral that can contain liquid inclusions and partially healed fractures.
Luster Vitreous
Fracture Uneven
Cleavage Perfect, in one direction, Good, in one direction, Poor, in one direction
Celestite Chemistry & Crystallography
Chemical Name strontium sulfate
Chemical Formula SrSO4
Crystal System Orthorhombic
Chemistry Classification Sulfate

Celestite Colors

  • Black Celestite Black
  • Blue Celestite Blue
  • Green Celestite Green
  • Brown Celestite Brown
  • Orange Celestite Orange
  • Pink Celestite Pink
  • Colorless Celestite Colorless
  • White Celestite White

Alternate Names

Celestine

Countries of Origin

United States of America (the); Unknown; Brazil; Italy; South Africa; Madagascar

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Tim Matthews

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Tim Matthews

Tim Matthews is President and Chief Executive Officer of Jewelry Television® (JTV), as well as a member of the company's Board of Directors. He oversees and leads all aspects of the company's powerful omni-digital retail platform that uniquely specializes in fine jewelry and gemstones. His passion for business and gemstones has led him to become a recognized expert in the field of gemology. He is a life member of the Gemmological Association of Great Britain (Gem-A) and has earned Gem-A's highest degrees, the Gemmology (FGA) and Diamond (DGA) diplomas. He is also a Graduate Gemologist (GG) of the Gemological Institute of America (GIA) and has also completed GIA's Graduate Diplomas in Diamonds, Colored Stones and Pearls. Under his leadership, JTV has become the leader in the sourcing and selling of color gemstones and jewelry.

This page was created on June 27, 2014.

This page was last edited on October 24, 2019.