News tagged with gemstone
Getting the most out of gemstones
Jun 25, 2009 |
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Emeralds, rubies and the like are referred to as colored gemstones by experts. They sparkle and shine with varying intensity, depending on the cut. A new machine can achieve the best possible cut and extract ...
Search results for gemstone
Smart drug delivery system -- Gold nanocage covered with polymer (w/ Video)
Nov 01, 2009 |
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In campy old movies, Lucretia Borgia swans around emptying powder from her ring into wine glasses carelessly left unattended. The poison ring is usually a confection of gold filigree holding a cabochon or ...
A rare discovery: An engraved gemstone carrying a portrait of Alexander the Great
Other Sciences / Archaeology & Fossils
Sep 15, 2009 |
4.4 / 5 (20) |
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A rare and surprising archaeological discovery at Tel Dor: A gemstone engraved with the portrait of Alexander the Great was uncovered during excavations by an archaeological team directed by Dr. Ayelet Gilboa ...
Opals set to shine with new grading technology
Aug 31, 2009 |
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CSIRO and a consortium of Australian Opal miners (Opal Producers Australia Limited) have unveiled the world's first automated device to grade opals using image analysis, at the 2009 National Council of Jewellery ...
From opals to optical chips
Mar 03, 2008 |
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Materials known as photonic crystals could form the building blocks of future optical computers and micro-scale communications devices. Scientists have developed a low-cost and versatile way to make photonic ...
Hidden gems: New composites are stiffer than diamond
Feb 15, 2007 |
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Using a unique combination of barium titanate and tin, University of Wisconsin-Madison researchers have made the first known material that's stiffer than diamond. The group published its results in the Feb. 2 issue of Science.
Was There Water on Mars Long Enough for the Origination of Life?
Space & Earth / Space Exploration
Oct 18, 2006 |
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Based on the lovely green rock, olivine, also known as the gemstone, peridot, a Virginia Tech graduate student has created a mineral lifetime diagram that provides the a clue to when and for how long there might have been ...
Identifying gems and minerals on Earth and on Mars
Physics /
Mar 10, 2006 |
4.3 / 5 (12) |
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It'll be a snap to identify gemstones once Robert Downs finishes his library of spectral fingerprints for all the Earth's minerals. Downs is almost halfway there. So far, the associate professor of geosciences ...
Emission of light under control: "lifetime-warp" in a photonic crystal
Physics /
Aug 06, 2004 |
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When you flip a light switch, a steady stream of photons is emitted by millions of atoms inside a light bulb. All atoms emit light at random instants in time, just like rain drops ticking on a roof. A team of ...
List of search results for gemstone
