Amblygonite

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Amblygonite is quite possibly one of the most beautiful pastel colored gemstones that you may have never heard about. It belongs to a class of minerals known as phosphates and forms a solid-solution series with montebrasite. Industrial grade amblygonite isn't that rare; however, when it comes to facet grade material, it quickly moves up on the hard-to-find list. Colors for amblygonite include pale yellow to greenish yellow and various shades of green to blue. On rare occasions, pink to light purple specimens may be found. Colorless material also is available.

Amblygonite Polished
Amblygonite Classification
Common Name Amblygonite
Species Amblygonite
Amblygonite Optical Properties
Transparency Transparent
Dispersion Strength: Weak Fire Value: 0.014
Refractive Index 1.577-1.613
Birefringence 0.020- 0.027
Optic Character Biaxial
Optic Sign Positive or Negative
Polariscope Reaction Doubly Refractive (DR)
Fluorescence SWUV: Inert to moderate orange
LWUV: Inert to moderate yellowish white
Pleochroism None
Amblygonite Characteristic Physical Properties
Hardness 5.5-6.0
Streak White
Specific Gravity 2.980-3.600 Typical:3.020
Toughness Poor
Inclusions Amblygonite might show liquid inclusions has a screen like appearance. Stones might also have a hazy parallel bands along the cleavage planes.
Luster Vitreous, Greasy
Stability Poor
Fracture uneven, subconcoidal
Cleavage Perfect, in one direction, Good in one direction
Amblygonite Chemistry & Crystallography
Chemical Name lithium aluminum phosphate fluoride hydroxide
Chemical Formula (Li,Na)Al(PO4)(F,OH)
Crystal System Triclinic
Chemistry Classification Phosphate

Amblygonite Colors

  • Purple Amblygonite Purple
  • Yellow Amblygonite Yellow
  • White Amblygonite White
  • Pink Amblygonite Pink
  • Green Amblygonite Green
  • Blue Amblygonite Blue
  • Colorless Amblygonite Colorless
  • Brown Amblygonite Brown

Countries of Origin

Unknown; Brazil; Spain

History

Be romanced by the lovely colors of amblygonite. From soft, seawater blues to verdant springtime greens, this cool beauty can easily become a favorite. The mineral amblygonite is fairly common, but clear, gem-quality stones are extremely rare. This rarity helps to keep amblygonite relatively unknown and somewhat costly. The name amblygonite derives from the two Greek roots that translate to blunt angles, a reference to one of its crystal habits or the way the crystal grows.

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More About Amblygonite

Amblygonite has been called the "Prophet Stone", which suggests that in historical folklore it may have been used as a visionary stone.

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Tim Matthews

Author

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.