Florida State University
Florida State University: Molecular Expressions: Birthstone Collections
This birthstone resource presents a brief description of each birthstone, a link to more information and a photomicrograph of the gem.
Burke Museum
Burke Museum: Birthstones: Myths and History
As part of the Burke Museum's site on Geology, this page details the birthstones for each month and discusses both the myth and the history behind birthstones.
Wikimedia
Wikipedia: Aquamarine and Maxixe
Article on the mineral beryl with a section on aquamarine, which is a variety of beryl.
Jewelry Central
Jewelry Central: Sapphire
This commercial site contains information about the sapphire's physical properties and where it can be found. Also discusses the history and romance related to the stone and includes a description of its quality.
Jewelry Central
Jewelry Central: Amethyst
Information on this commercial site gives the physical properties and origin of the amethyst, as well as some of the mythical and metaphysical properties ascribed to the gemstone.
Other
Icga: Peridot, Extraterrestrial Gem
Site provides many fun facts about the gem peridot, including information on its history and physical and metaphysical properties. Also provides a picture of the gem itself.