Opal Websites
olat.org
OLAT offers a flexible online course system along with extensive features to guarantee learning and teaching independent of time and place. It has been created especially for public institutions such as universities, academies or colleges, but it is also suitable for other businesses. OLAT has been developed [OLAT...
OPAL | Explore your local environment
Take part in wildlife surveys, improve your identification skills and enjoy science and nature activities near you.
Minerals and fossils, mineralogy, Mineral Town.com
Minerals and fossils collecting, Resources for worldwide mineral and fossil collectors with articles on mineralogy, mineral photo gallery, rock cycle, moh's scale, free trade fossil and mineral ads.
Satya Center -- Alternative Health, Relationships & Global News
Articles and link directories on alternative health, love, relationships and global news. Shop huge selection of natural crystals and gemstones: clear quartz, amethyst, citrine, Lemurian quartz, Super 7, smoky quartz, rutilated quartz -- rough, unpolished, and polished, points, wands, spheres, jewelry, earrings,...
A Sharp
A Sharp, LLC is the creator of the games King of Dragon Pass, the saga of colonizing a magical land (for iOS, Windows, and Mac), and Jigami, the jigsaw strategy game for iPhone; Opal, easy notes and organizing; DiceBook for iPad; Addressix, the quickest way to print envelopes; and Acta, the award-winning outline...
Gemology, Gem Rough,Gemology,Gem Identification Tools,Facet Rough - PrettyRock.com
Gemology,Facet Rough,Gem Identification Tools,Gem ID Instruments,Gem Rough,Cutting Rough
YourGemologist On-line Study of Gemology, Jewelry and Gemstones
The largest gemology study and reference site on the internet
Bestcrystals.com - Crystals, Minerals, Fossils, Meteorites, Rocks
Bestcrystals.com is the online Rock Shop of hundreds of crystals, minerals, fossils from around the world, from $1 to grade 'A' specimens. Secure ordering and world-wide shipping. Quartz crystal, amethyst, citrine, smoky, rutilated, rose, ametrine, labradorite,malachite, selenite, celestite, tourmaline, aquamarine,...