http://terra-enterprises.com/TerraGiftStones/ en-us copyright 2008, Terra Enterprises, Brandon, FL kass@terra-enterprises.com (Kass Evans) gemstones collectibles Terra Gift Stones is a manufacturer and retailer of gemstone collector kits. Product lines include gemstone identification kits to teach collectors how to master gemology tools (polarisope, dichroscope, etc), a wide range of beginner and learning kits, and Terra's original line of gemstone greeting cards, birthstone gift sets. Terra Gift Stones is a division of Terra Enterprises. http://terra-enterprises.com/TerraGiftStones/images/ElevenGemCluster-40pixHigh.gif http://terra-enterprises.com/TerraGiftStones/ http://terra-enterprises.com/TerraGiftStones/index.html Now customers can be updated instantly when Terra adds a new item to its product line. Coming soon will be a dichroscope gemstone identification activity kit and a Specific Gravity balance. http://terra-enterprises.com/TerraGiftStones/index.html http://terra-enterprises.com/TerraGiftStones/Mini-Kit_Refractometer.html The refractometer is one of the primary tools used by gemologists. Learn how and when to use a refractometer for identification. The full-color heavily illustrated guide will visually take the user through each step of the process. http://terra-enterprises.com/TerraGiftStones/Mini-Kit_Refractometer.html http://terra-enterprises.com/TerraGiftStones/Mini-Kit_Polariscope.html Learn how and when to use a polariscope for gemstone identification. The illustrated guide provides step-by-step help on how to identify singly and doubly refractive gemstones and how to recognize a gemstone that is exhibiting anomolous double refraction (included garnet and fluorite). http://terra-enterprises.com/TerraGiftStones/Mini-Kit_Polariscope.html