Hemimorphite

saf-ahyuh r

Found in several worldwide locations that are often zinc-rich environments, most hemimorphite crystals are white to grayish white, yellowish or totally colorless. But when the robin's egg blue hues are found, miners know they have hit a pocket of true gem-quality material. Not only is fine quality hemimorphite geologically scarce, but there are few locations that have the right combination of trace minerals that create this stunning blue color. This gem is often appreciated as natural specimens due to its almost bubbly botryoidal crystal habit.

Hemimorphite Polished
Hemimorphite Classification
Common Name Hemimorphite
Species Hemimorphite
Hemimorphite Optical Properties
Transparency Transparent - Translucent
Dispersion Strength: Moderate Fire Value: 0.020
Refractive Index 1.614-1.636
Tolerance:(+0.003/-0.003)
Birefringence 0.022
Optic Character Biaxial
Optic Sign Positive
Polariscope Reaction Aggregate (AGG), Doubly Refractive (DR)
Fluorescence SWUV: Inert
LWUV: Inert
Pleochroism Unobservable
Hemimorphite Characteristic Physical Properties
Hardness 4.5-5
Streak White
Specific Gravity 3.300-3.500 Typical:3.450
Toughness Poor
Luster Vitreous
Fracture Uneven, Subconchoidal
Cleavage Perfect, in one direction, Good, in one direction
Hemimorphite Chemistry & Crystallography
Chemical Name hydrated zinc silicate hydroxide
Chemical Formula Zn4Si2O7(OH)2.H2O
Crystal System Orthorhombic
Chemistry Classification Silicate

Hemimorphite Colors

  • Brown Hemimorphite Brown
  • Blue Hemimorphite Blue
  • Colorless Hemimorphite Colorless
  • White Hemimorphite White
  • Yellow Hemimorphite Yellow
  • Green Hemimorphite Green
  • Gray Hemimorphite Gray

Alternate Names

Calamine

Countries of Origin

Afghanistan; Unknown; China; Congo (the); Dominican Republic (the); Italy; Mexico; Madagascar; Peru

Shop Hemimorphite

Sisk Gemology Reference

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.

Shop Now

 
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.