Agriculture
Got Milk? How?
Where Have All the Bees Gone?
Watching out for vultures
Amphibians
Newts
Tree Frogs
Toads
Animals
Awake at Night
Fishy Cleaners
Crocodile Hearts
Behavior
Making Sense of Scents
Taking a Spill for Science
World’s largest lizard is venomous too
Birds
Penguins
Finches
Mockingbirds
Chemistry and Materials
Atomic Drive
Gooey Secrets of Mussel Power
Salt secrets
Computers
Middle school science adventures
Galaxies on the go
Galaxies far, far, far away
Dinosaurs and Fossils
Dinosaur Eggs-citement
Dino-Dining Dinosaurs
Middle school science adventures
E Learning Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
2014 GSAT Results for Jamaican Kids
Results of GSAT are in schools this week
Earth
Groundwater and the Water Cycle
Drilling Deep for Fuel
A Volcano's Deadly Ash
Environment
Flu river
Whale Watch
Watching for Wildfires in Yellowstone
Finding the Past
Of Lice and Old Clothes
Decoding a Beverage Jar
Unearthing Ancient Astronomy
Fish
Seahorses
Parrotfish
Trout
Food and Nutrition
Sponges' secret weapon
The Color of Health
A Taste for Cheese
GSAT English Rules
Order of Adjectives
Subject and Verb Agreement
Problems with Prepositions
GSAT Exam Preparation Jamaica
2014 GSAT Results for Jamaican Kids
GSAT stars reap scholarship glory
Preparing for the GSAT Exam
GSAT Exams Jamaica Scholarships
GSAT stars reap scholarship glory
Results of GSAT are in schools this week
42,000 students will sit for the GSAT Exam in two weeks
GSAT Mathematics
GSAT Mathematics Quiz, Teaching Math, teaching anxiety
A Sweet Advance in Candy Packing
GSAT Practice Papers | GSAT Mathematics | Maths
Human Body
Don't Eat That Sandwich!
Spit Power
The tell-tale bacteria
Invertebrates
Tarantula
Mollusks
Hermit Crabs
Mammals
Armadillo
African Wildedbeest
African Elephants
Parents
Raise a Lifelong Reader by Reading Aloud
Expert report highlights the importance to parents of reading to children!
What Not to Say to Emerging Readers
Physics
Invisibility Ring
One ring around them all
Dreams of Floating in Space
Plants
City Trees Beat Country Trees
Getting the dirt on carbon
Cactus Goo for Clean Water
Reptiles
Boa Constrictors
Anacondas
Reptiles
Space and Astronomy
Chaos Among the Planets
Gravity Tractor as Asteroid Mover
Asteroid Lost and Found
Technology and Engineering
Dancing with Robots
Supersuits for Superheroes
Beyond Bar Codes
The Parts of Speech
Countable and Uncountable Nouns
What is a Noun
Problems with Prepositions
Transportation
Seen on the Science Fair Scene
Revving Up Green Machines
Middle school science adventures
Weather
The Best Defense Is a Good Snow Fence
Catching Some Rays
Where rivers run uphill
Add your Article

Diamond Glow

Diamonds are expensive because they're beautiful and rare. But fake diamonds often sell for a lot of money, too, because they can look very real. Now, scientists have discovered a way to distinguish certain genuine diamonds from imitations. The simple new technique works with a rare form of blue diamond that glows in the dark. Diamonds that belong to a group called type IIb usually look blue. After they absorb high-energy light, though, type IIb diamonds phosphoresce, or glow in the dark, for a little while. This phosphorescence ranges in color from blue to pink to fiery red, depending on the diamond. Type IIb diamonds can be stunning, and some of them are quite famous. The large Hope Diamond, for one, glows orange-red for up to a minute after the lights go out. (The Hope Diamond is on display at the Smithsonian Institution's National Museum of Natural History in Washington, D.C.) Despite these diamonds' rarity and fame, however, scientists hadn't paid much attention to them till recently. To learn more about the stones, chemical engineer Sally Eaton-Magaña of the Gemological Institute of America in Carlsbad, Calif., and her colleagues studied a set of diamonds called the Aurora Heart Collection. The set contains 239 colored diamonds, including many blue, type IIb gems. They also studied the Smithsonian's Hope Diamond and its Blue Heart Diamond. In all, the researchers did experiments with 67 natural blue diamonds, three manmade gems, and a gray diamond that scientists had turned blue with a combination of temperature and pressure treatments. In one test, the scientists shone ultraviolet light—a type of high-energy light—on each gemstone for 20 seconds. Afterward, all the natural type IIb diamonds glowed for several seconds. Measurements revealed that this glow contained two wavelengths of visible light: greenish-blue and reddish. The relative strength of each wavelength determined the color of the final glow. And because each diamond is different, the scientists could use the color of the glow and how quickly the glow fades as a sort of fingerprint to identify individual gems. The technique also proved to be a good way to separate the real gems from the fakes. Neither the manmade diamonds nor the falsely colored gray diamond glowed in the reddish wavelength. The new strategy might help solve one of the diamond market's biggest problems: hard-to-spot fakes.—Emily Sohn

Diamond Glow
Diamond Glow








Designed and Powered by HBJamaica.com™