Beryl

saf-ahyuh r

The name beryl is derived from the ancient Greek term for the same gem, beryllos; also the etymology for the element beryllium that is part of its chemistry. Some scholars believe the word beryl is related to the ancient trading city of Belur or perhaps has ancient Indian origins (being derived from the old Hindi word velurya or the Sanskrit word vaidurya). Varieties include emerald, bixbite (red beryl), morganite, aquamarine, heliodor (golden beryl) and goshenite.

Beryl Polished
Beryl Classification
Common Name Beryl
Species Beryl
Beryl Optical Properties
Transparency Transparent - Opaque
Dispersion Strength: Weak Fire Value: 0.01400
Refractive Index 1.577-1.583
Tolerance:(+0.017/-0.017)
Birefringence 0.005-0.009
Optic Character Uniaxial
Optic Sign Negative
Polariscope Reaction Doubly Refractive (DR)
Fluorescence SWUV: Inert
LWUV: Inert
Pleochroism Varies based on color
Beryl Characteristic Physical Properties
Hardness 7.5
Streak White
Specific Gravity 2.670-2.900 Range:0.18/-0.05 Typical:2.720
Toughness Good
Inclusions All beryl are type I stones with the exception of emerald and bixbite which are Type III clarity stones. Stone might have liquid and fingerprint inclusions, 2-phase or 3-phase inclusions, tubular inclusions and needles.
Luster Vitreous
Stability Good
Fracture Conchoidal
Cleavage Poor, in one direction
Beryl Chemistry & Crystallography
Chemical Name beryllium aluminum silicate
Chemical Formula Be3Al2(SiO3)6
Crystal System Hexagonal
Chemistry Classification Silicate

Beryl Colors

  • Blue Beryl Blue
  • Yellow Beryl Yellow
  • White Beryl White
  • Multi-color Beryl Multi-color
  • Green Beryl Green
  • Brown Beryl Brown

Beryl Spectra

Beryl Spectra
BERYL - HYDROTHERMAL Lab Created(ε ray)

Color due to chromium and cobalt. Two groups of absorption are seen, one in the yellow - green with a series of lines from 540nm; to 575nm; and in the blue - violet with a broad strong band at 450nm; and a weaker line at 410nm Transmitting the e - ray alone.

Beryl Spectra
BERYL Maxixe type

Color due to irradiation induced color center. The main feature here is the absorption band at 645nm. and two bands in the green-yellow area which merge to appear as a weak diffuse absorption. In stones of a deeper blue color other fine lines may be seen in the green, but unlike the aquamarine variety of beryl no bands are visible in the blue.

Beryl Spectra
BERYL - HYDROTHERMAL Lab Created. (Unpolarized)

Color due to chromium and cobalt. Two groups of absorption are seen, one in the yellow - green with a series of lines from 540nm; to 575nm; and in the blue - violet with a broad strong band at 450nm; and a weaker line at 410nm

Beryl Spectra
BERYL - HYDROTHERMAL Lab Created. (ω ray)

Color due to chromium and cobalt. Two groups of absorption are seen, one in the yellow - green with a series of lines from 540nm; to 575nm; and in the blue - violet with a broad strong band at 450nm; and a weaker line at 410nm. When polarized to transmit the o - ray only, the group of lines in the green become a little weaker and the broad band in the blue remains strong

Jewelry Television acknowledges the significant scientific contributions of John S Harris, FGA to the study of gemstone spectra and with deep appreciation to him, acknowledges the use of his images and related notes about gemstones and their spectra in the educational materials on this website.

Countries of Origin

Tanzania, United Republic Of; Colombia; Afghanistan; United States of America (the); Sri Lanka; Madagascar; Zambia; India; Mozambique; Pakistan; Unknown; China; Namibia; Brazil; South Africa; Nigeria

History

The beryl family is one of the most prestigious families of gemstones, claiming treasures like the emerald, aquamarine and morganite. It could be considered "gemstone royalty" for its many-colored member stones. Each beryl gemstone has its own place in the jewelry world, and each has its own story to tell.

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Showcasing 200 gemstones in over 1,000 pages and accompanied by more than 2,000 photos, The Sisk Gemology Reference is a must-have in every collector’s library. Each comprehensive, three-volume set features state-of-the-art photography, detailed illustrations, and scientifically precise descriptions to create an entrancing experience for gemstone amateurs and afficionados alike.

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Species/Variety

Green Beryl

Green beryl, like emerald, owes its color to the presence of either chromium, vanadium, or both. It differs from emerald in that the green hues are lighter in tone and less saturated.

Green Beryl Beryl
Green Beryl Classification
Common Name Green Beryl
Green Beryl Optical Properties
CCF Reaction May appear pink or red
Pleochroism Dichroic, Moderate to strong; variations of body color
Green Beryl Characteristic Physical properties
Stability Fair

Creation Classification

Lab Created

Hydrothermally grown synthetic gems crystallize slowly out of a solution (a mix of water and dissolved elements) that has been exposed to heat and pressure similar to the conditions on Earth under which the natural gem mineral grows.Synthetic gems have the same chemical, optical, and physical properties of their natural counterparts, but are a more cost-effective alternative to a natural gem.

Lab Created Beryl
Lab Created Classification
Common Name Lab Created
Lab Created Optical Properties
Refractive Index 1.571-1.578
Tolerance:(+0.002/-0.003)
Birefringence 0.006-0.008
Pleochroism Dichroic, moderate to strong, varying shades of body color
Lab Created Characteristic Physical properties
Inclusions Hydrothemal synthetic beryl often contains liquid and 2-phase inclusions, nailhead spicules, seed plates and partially healed fractures. The white material can also have a branch-like appearance.In some material wavy or chevron like growth can be seen.
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.