Sapphire Quality Factors | Different Types & Colors of Sapphire - GIA
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! Blue Sapphires. Color has the greatest influence on a sapphire’s value, and preferred sapphires have strong to vivid color saturation.
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
Sapphire Description - GIA
Blue sapphire belongs to the mineral species corundum. It can be a pure blue but ranges from greenish blue to violetish blue. The name “sapphire” can also apply to any corundum that’s not red and doesn’t qualify as ruby, another corundum variety.
Sapphire Gemstone | Sapphire Stone - GIA
The most highly valued blue sapphires are velvety blue to violetish blue, in medium to medium dark tones. Preferred sapphires also have strong to vivid color saturation. The saturation should be as strong as possible without darkening the color and compromising brightness.
Sapphire History and Lore - GIA
Most jewelry customers think all sapphires are blue, and when gem and jewelry professionals use the word “sapphire” alone, they normally mean “blue sapphire.” A special orangy pink sapphire color is called padparadscha, which means “lotus flower” in …
Blue diffusion-treated sapphires are be- coming more prevalent than ever before. The diffusion technique, which involves the addition of color-causing chemicnls during heat trentment, results in a thin layer of color at the surface of colorless or light-colored sapphire. The color was found to be stable to routine cleaning pro-
- [PDF]
SAPPHIRE - GIA 4Cs
Sapphire is a durable gem that is most often thought of as being blue. However, the name “sapphire” also applies to any color of corundum, except red which is ruby, another corundum variety. SAPPHIRE TIPS AND ADVICE WORK WITH A JEWELER TO UNDERSTAND THE DIFFERENCE THAT COLOR MAKES. Look at di˜ erent colors of sapphire side by side to
Geographic Origin Determination of Blue Sapphire
2018年1月26日 · Geographic origin determination, one of the most pressing issues facing modern gemological laboratories, is especially challenging for blue sapphire. Reliable origin determination requires careful analysis of a stone’s inclusions and trace element chemistry as well as spectroscopic data.
Sapphire - Gemological Institute of America
Sapphire is famous for its blue color, but it also comes in many other colors, such as orange and pink. They are called fancy sapphires. There are also color change sapphires which change color under different lighting.
September Birthstone | Sapphire Birthstone History & Location - GIA
“Sapphire” comes from the Greek word sappheiros and blue sapphire is one of the most popular colored stones. Read on to learn more about the September birthstone, specifically its history and where it can be found.