Other
Icga: Aquamarine, Gem of the Sea
A brief description of the physical properties of the aquamarine gemstone, along with a perspective on its history and metaphysical properties.
Other
Icga: Agate, Stripe Up the Bands
An interesting, brief discussion of the gem and mineral agate, including its physical properties and historical uses.
New York Times
New York Times: Crossword Puzzle: Rocks and Minerals
Here is an interactive and printable crossword puzzle developed by the New York Times Learning Network. The theme of this puzzle is Rocks and Minerals.
Other
Bob's Rock Shop: Rock & Gem: Agates From the Land of Pumas and Craters
An article about hunting agate in Argentina, from Rock & Gem magazine.
Wikimedia
Wikipedia: Jade
A concise definition of jade along with a comparison of nephrite and jadeite.
Other
Gem Hut: Sky Blue Topaz
A commercial site with a short description of the physical properties of topaz, and pictures of cut and polished stones for sale.
Other
Gem Hut: Garnet
This commercial site gives information about garnet, including some of the varieties and where they are found. It also has pictures.
Other
Gem Hut: Moonstone Gemstones
This commercial site gives a brief description of moonstone with pictures of finished stones.
Other
Dr mirkin.com: Iron, Other Minerals and Heart Attacks
This site is a doctor's report on how iron intake could be related to heart attack incidents.
Curated OER
A Photo of the Mineral Bismuth
This site contains a chart with properties of the element Bismuth (Bi). It also has links to 3 pictures of the element.
Curated OER
The Mineral Gallery: Amethyst
A detailed description of amethyst, including its physical properties and the more noteworthy locations it is mined.
Curated OER
The Mineral Gallery: Aquamarine
This site has some background information on aquamarine, a blue form of beryl. Provides details about variety, uses, color, and more. Detailed and helpful information.
Curated OER
The Mineral Gallery: Diamond
A detailed discussion of the physical properties of diamonds, including different forms of carbon, locations of origin, uses, color, and more. Informational and helpful concerning diamonds.
Curated OER
The Mineral Gallery: Emerald
A brief physical description of emeralds from an online database about minerals. Provides information about history, characteristics, color, and use.
Curated OER
Amethyst Galleries: Jade
This site gives a basic description and information on jade. Provides information about uses, color, hardness, and history.
Curated OER
Boulder Opal
This site gives basic information on the physical characteristics of opal. Also gives information on class, group and uses and provides a picture and chart.
Curated OER
Jelly Opal
This site gives basic information on the physical characteristics of opal. Also gives information on class, group and uses and provides a picture and chart.
Curated OER
Yowah Nut Opal
This site gives basic information on the physical characteristics of opal. Also gives information on class, group and uses and provides a picture and chart.
Curated OER
Hyalite
This site gives basic information on the physical characteristics of opal. Also gives information on class, group and uses and provides a picture and chart.
Curated OER
Precious Opal
This site gives basic information on the physical characteristics of opal. Also gives information on class, group and uses and provides a picture and chart.
Curated OER
Opalite
This site gives basic information on the physical characteristics of opal. Also gives information on class, group and uses and provides a picture and chart.
Curated OER
The Amethyst Gallery: Peridot
This brief article has information on the physical characteristics of peridot and where it is found. Includes information about color, uses, and hardness, and provides pictures of the gem.
Curated OER
The Mineral Gallery: The Mineral Zircon
This site gives general information on the physical characteristics of zircon.
Curated OER
Amethyst Gallery: The Mineral Gallery
This site gives is an entry portal to information on gems and gemstones, including pictures of specimens and details on their physical properties and where they can be found.