Skip To Content
Go to gemstones.com homepage
Sign In
Recommended searches
Gemopedia
  • Ruby
  • Sapphire
  • Tanzanite
  • Diamond
  • Emerald
  • Opal
  • Moissanite
  • Peridot
  • All Gemstones in Gemopedia
Shop Gemstones
  • Shop Jedora Gemstones
  • Shop JTV Gemstones
Videos
  • All About Black Diamonds
  • Unboxing a Million Dollars in Gemstones!
  • Unboxing Emeralds: Gemologist vs. Geologist
  • Unboxing Rough Diamonds
  • Unboxing Garnet: Rhodolite, Pyrope, Demantoid
  • Marvel Cinematic Gemstones
  • All About Pearls and How They're Made
  • Fun Facts About Tanzanite
  • Freshwater Pearls vs. Saltwater Pearls
  • All Videos
Articles
  • Gemstone Collecting
  • Gemstone Beauty
  • Gemstone Color
  • Gemstone Origins
  • Optical Properties
  • Rare Gemstone Collecting
  • Gemstone Luster
  • Phenomenal Gemstones
  • All Articles
Showcase Collections
  • Quartz Gemstones
  • Organic Gemstones
  • American Gemstones
  • Birthstones
  • Mineral Specimens
  • Colors of Tourmaline
  • All Showcases
About Us
  • About Us
Feedback
  • Survey
Account
  • Account Information
  • Author Biography
  • Articles
  • Gemstones Home
  • Gemopedia

Aragonite

Aragonite

By Tim Matthews, JD, FGA, GG, DGA,
CEO and President of JTV (retired)
Published: June 2014
Modified: June 2023
Aragonite Polished Aragonite Rough Aragonite Jewelry
  • Facebook
  • Twitter
  • Copy Link
Table of Contents
  • General Information
  • Aragonite Colors
  • Countries of Origin
  • Care
  • More About Aragonite
  • Optical Phenomena

Aragonite's name is derived from the location of Molina de Aragon, Spain, the province where it was first discovered. Aragonite occurs in Agrigento, Sicily, Italy, in the famous sulfur mines, as well as on Mount Vesuvius, Italy. Aragonite specimens are highly prized by mineral collectors for their wide variety of forms, which include twins and pseudomorphs (uncharacteristic crystal forms). As a bonus, many specimens are fluorescent as well as phosphorescent, a rare occurrence among minerals. In the Sisk Gemology Reference, Jerry Sisk writes, "Aragonite is a fascinating mineral." In its biogenic form, it is produced by marine mollusks and one of two components within the nacre of pearls. It's also found in coral. (The term biogenic is used for any gem material derived from living organisms.) Aragonite is a polymorph of calcite, sharing the same chemical formula but with different crystal structures. We like aragonite as a gemstone for collectors, although it is occasionally set in jewelry.

General Information

  • Classification
  • Optical Properties
  • Characteristic Physical Properties
  • Chemistry & Crystallography
Common Name
Aragonite
Species
Aragonite
Transparency
Transparent - Opaque
Refractive Index
1.530-1.685
Birefringence
0.155
Optic Character
Biaxial
Optic Sign
Negative
Polariscope Reaction
Aggregate (AGG), Doubly Refractive (DR)
Fluorescence
SWUV: Variable
LWUV: Variable
Pleochroism
None
Hardness
3
Streak
White
Specific Gravity
2.930-2.950 Typical:2.940
Toughness
Varies
Luster
Vitreous, Silky
Fracture
Subconchoidal, Splintery
Cleavage
Good, in one direction, Poor, in two directions
Chemical Name
calcium carbonate
Chemical Formula
CaCO3
Crystal System
Orthorhombic
Chemistry Classification
Carbonate

Aragonite Colors

  • Blue Aragonite
    Blue
  • Brown Aragonite
    Brown
  • Colorless Aragonite
    Colorless
  • Gray Aragonite
    Gray
  • Green Aragonite
    Green
  • Pink Aragonite
    Pink
  • Purple Aragonite
    Purple
  • Red Aragonite
    Red
  • White Aragonite
    White
  • Yellow Aragonite
    Yellow
  • Yellow Aragonite
    Yellow
  • Yellow Aragonite
    Yellow

Countries of Origin

Papua New Guinea; Kazakhstan; Portugal; Bahamas; Greece; Mongolia; Morocco; Unknown; Iraq; Chile; Argentina; Ukraine; India; Canada; Turkey; Belgium; Namibia; Finland; South Africa; Peru; Turkmenistan; Venezuela (Bolivarian Republic of); Germany; Tanzania, United Republic Of; Viet Nam; Thailand; United Kingdom of Great Britain and Northern Ireland; Kiribati; Sweden; Poland; Bulgaria; Jordan; Kuwait; Nigeria; Tunisia; Palestine, State of; Croatia; Tuvalu; Kenya; Switzerland; French Polynesia; Spain; Azerbaijan; Cuba; Mauritania; Congo (the Democratic Republic of the); Israel; Australia; Tajikistan; Myanmar; Cyprus; Iceland; Oman; Austria; Mozambique; Luxembourg; Brazil; Algeria; Cabo Verde; Slovenia; Colombia; Ecuador; Hungary; Republic of Kosovo; Japan; Taiwan (Province of China); Albania; Bolivia (Plurinational State of); Lao People's Democratic Republic; New Zealand; Vanuatu; United States Minor Outlying Islands; Honduras; Italy; Antarctica; Macedonia (the former Yugoslav Republic of); Afghanistan; Russian Federation; Czechia; United States of America; Egypt; Saudi Arabia; Netherlands; Pakistan; China; Ireland; Qatar; Slovakia; France; Serbia; Kyrgyzstan; Romania; Uzbekistan; Norway; Mexico; Zimbabwe; Indonesia

Care

Aragonite is very soft, so be mindful of scratching. It is easily attacked and dissolved by acids such as vinegar. Avoid abrasives, ultrasonic, solvents and heat. Aragonite is generally unsuitable for jewelry.

More About Aragonite

Aragonite is one of the few stones that is both biogenic and inorganic. Collectors are drawn to Aragonite because of its unusual crystal structure.

Optical Phenomena

Cat's Eye Aragonite

Cat's Eye Aragonite Aragonite
Cat's Eye Aragonite Aragonite
  • Classification
Common Name
Cat's Eye Aragonite
Instagram
Facebook
YouTube

Sign up for the latest from Gemstones.com!

 
 
  • About Us
  • Terms & Conditions
  • Privacy Policy
  • Sitemap
  • Contact Us
  • Request a Partner Invitation
  • Your Privacy Choices CCPA Icon

©  America's Collectibles Network, Inc. All Rights Reserved.