Hearts & Arrows (H&A) diamonds are precisely cut to show kaleidoscopic patterns when seen in a special reflective viewer. Typically associated with Excellent-Ideal cuts of superior quality, fashioning the highest levels of H&A optical precision when working with the world's hardest substance is an exacting process.
This 10+ carat HPHT produced lab-grown diamond was initially graded Fancy Intense Yellow by IGI. When it returned to the lab its color had been changed to Fancy Vivid Pink. IGI confirmed that the color had been shifted from yellow to pink through irradiation using a 5MeV Electron Beam Transfer system.
Treatments have been used to enhance the appearance of gemstones since ancient times. The Egyptians, Greeks and Romans used dyes, coatings, oils and other methods to improve the color, durability and luster of their gemstones and pearls. But the most fascinating and fanciful tool used for enhancements may very well be the humble chicken.
Gemstones and fancy-colored-diamonds appear in all the colors of the rainbow, at different shades, with different intensities. Since the human eye can distinguish around 13 million shades and nuances of color, gemologists have developed a consistent method of mapping a gemstone's proper position in the broad 'Color Universe.'
The "disappearing diamond" is a 16.87 carat natural Fancy Vivid Yellow SI1 Radiant shape, coated by carbon nanotube technology which absorbs more than 99.96% of light and is the blackest material in existence.
Rough sellers are partnering with technology providers to facilitate digital-scans, videos and potential polishing plans for rough diamonds to their customers. Originally intended to facilitate pre-selection of choices ahead of traditional tenders, remote-purchasing has now become an option.
Not everyone understands the importance of a transparent, accurate report of the gemological materials included in jewelry. And yet, such reporting not only advances your competitive position. It also serves to protect against legal disputes and demonstrates corporate social responsibility.
Did you know whatever device you're using to read this post - mobile, tablet or desktop - wouldn't exist without lab-grown diamonds? Did you know diamonds are being used for medical imaging, quantum entanglement and (you read it right) teleportation? Read on.
Nature never stops providing the extraordinary, unexpected and unique. This adamantine oddity was unearthed at an open-pit mine 200 miles north of Nyurba, Russia last October. Specialists immediately passed it to ALROSA's Research and Development Geological Enterprise.
Did you know that the sparkle of candlelight is actually created by millions of tiny, brightly burning nano-diamonds? In fact, around 1.5 million microscopic diamonds are created per second in the flame of a candle as it burns.