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The ICA is a worldwide body specifically created to benefit the global colored gemstone industry by advancing and promoting the knowledge and appreciation of colored ...
Facts and Lore about stones used in Native American Indian Jewelry
We can supply Appraisals and/or Gemological Laboratory Certificates on any gem we sell, if requested. Many of our Gems already have a Gem Identification Reports ...
Granite Colours Gallery (31) Our detailed online granite colour gallery has examples of many of the different stone colours. Each stone colour includes a close up, a ...
the Color of Art Pigment Database - the Pigment Green page is a complete artist's reference of green pigments, with color Index names, lightfastness and health ...
Green is the color between blue and yellow on the spectrum of visible light. It is evoked by light with a predominant wavelength of roughly 495–570 nm.
Labradorite is the plagioclase gemstone with a spectacular iridescent play-of-color known as labradorescence.
REFLECTIVITY OF STONE Stone contains natural crystals. These crystals reflect light to provide a shine on the surface. When the crystal, dull, crushed, or broken ...
Cone 6, cone 10 and raku glaze recipes, with some photographs of results.
Cosmos for Schools is an ever-growing collection of fun, interactive science lessons for middle school students. Visit us today to learn more!
Detailed information and photos for over 100 gemstone varieties from around the world!
Glossary of Fine Art: A-Z List of Terms Used in Painting, Sculpture, Architecture, Ceramics: 1000 BCE-present
What is the Rock Cycle? Rocks, like mountains, do not last forever. The weather, running water, and ice wear them down. All kinds of rocks become sediment.
the Color of Art Pigment Database: Pigment Red, is a complete artist's reference on red pigments used in making paint. It includes the Color Index names, chemical ...
Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) mineral particles or rock fragments. Most sandstone is composed of quartz or ...
Red Gemstones & Minerals. The following is a list of Red gems and minerals listed in our database. Click the pictures to get full data, click the X to remove the gem ...
Tumbled and Polished Stones Over 60 varieties of colorful tumbled stones from around the world.
Every stone and bead has different properties, usually determined by the stone's physical characteristics. Some stones heal, some attract positive energy, and some ...
Diamond cut refers to the proportions, polish, and symmetry of a stone: the three main factors involved in creating a diamond with optimal light reflection.
To identify an unknown mineral, start by answering the following questions: (1) What colour is the mineral? (2) What is the relief of the mineral?
Minerals form in many ways. The mineral halite, which is used as table salt, forms when water evaporates in a hot, shallow part of the ocean, leaving behind the salt ...
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