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Sapphire Quality Factors | Different Types & Colors of Sapphire - GIA
Sapphires that are not blue are known as fancy sapphires, and may be any color—except red (which is a ruby). The fancy sapphire colors are: pink, orange, yellow, green, purple, and violet. There truly is a different color of sapphire to suit anyone’s taste!
Sapphire Description - GIA
The name “sapphire” can also apply to any corundum that’s not red and doesn’t qualify as ruby, another corundum variety. Deep, intense, velvety blue is the best way to describe the color of this sapphire from the Kashmir region on the India/Pakistan border.
Sapphire Gemstone | Sapphire Stone - GIA
They come in violet, green, yellow, orange, pink, purple, and intermediate hues. Some stones exhibit the phenomenon known as color change, most often going from blue in daylight or fluorescent lighting to purple under incandescent light. Sapphires can even be gray, black, or brown. Sapphire Description. Sapphire History and Lore. Sapphire Journey
Ruby Quality Factors | The Color Range of Ruby | GIA
The finest ruby has a pure, vibrant red to slightly purplish red color. In most markets, pure red colors command the highest prices and ruby with overtones of orange and purple are less valued. The color must be neither too dark nor too light to be considered finest quality.
Bicolor Synthetic Sapphire | Gems & Gemology - GIA
2020年7月22日 · Olga Tanskaia showed us their extensive color range of synthetic sapphire, spinel, beryl, garnet, and other lab-grown crystals produced using a variety of crystal growth methods. She noted that blue and red synthetic gems are always their best sellers.
September Birthstone | Sapphire Birthstone History & Location - GIA
Sapphire, the September birthstone comes in all the colors of the rainbow – except red. Learn more about the birthstone of wisdom, loyalty, and nobility and discover its history and where it can be found.
Sapphire Gemstone | Sapphire Stone - GIA
Look at different colors of sapphire side by side to understand the range of qualities available. Dark colors like navy or midnight blue, and less saturated colors like grayish blue or straw yellow are more affordable than vivid colors.
A Quantitative Description of the Causes of Color in Corundum
2018年1月26日 · From pigeon’s blood red ruby to cornflower blue and lemon yellow sapphire, nearly every color is represented. The only corundum color not represented in nature is a saturated intense emerald green. However, less intense olive green to teal green stones are often found in basalt-hosted corundum deposits.
Ruby Gemstone | Ruby Stone - GIA
Color. Color is the most significant factor affecting a ruby’s value: Fine gems are a pure, vibrant red to slightly purplish red.
Low-Fe, High-V Color-Change Burmese Sapphire | Gems
This 5.68 ct cushion mixed-cut sapphire showed a strong color change from grayish violet in fluorescent light to purple-pink in incandescent light. Photo by Robison McMurtry. A color-change sapphire was recently submitted to the GIA lab in Carlsbad for an origin determination report.