14 Days Free Returns
 Free US$15 shipping coupon for first time order code FS1
Total SKU's 13,726
Vendors 87
Registered Members 3,229
 Gem Guide
- Birthstones
- Gold and Other Precious Metals
- Gemstones By Color
- Gemstone Sizes and Weights
- The Nine Sacred Navaratnas
- Ruby Buying Guide
- Physical Properties of Gemstones
- Sapphire Buying Guide
- Anniversary Gemstones
- Gemstone Attribute Table
- AIGS Master Color Chart
- Gemstone Color and Clarity Guide
- Gemstone Cut and Appraisal Guide
- The Mohs Hardness Scale
Gems Directory
  JTC Standing Showcase for Rent
  JTC Office Space for Rent
  JTC Jewelry Booth for Rent
  JTC Retail Showroom for Rent
Search Result > Total (1) Item Found. Sort By :  Price  |  Price Per Carat  |  Weight  |  Shape 

Color-change gemstones display differing hues under indoor incandescent lighting and outdoor sunlight, with alexandrite chrysoberyl being by far the best known of these. However, the phenomenon can also be encountered in sapphire, garnet, spinel, fluorite and diaspore, with the latter often sold under the trade name “zultanite”.

Although artificial incandescent light and natural sunlight both contain the full spectrum of colors, the relative intensity of each hue varies between these two so-called “white light” sources. For example, the somewhat yellowish incandescent light bulbs tend to emit larger quantities of low-frequency red light, so color-change stones tend to be somewhat reddish when worn indoors. Conversely, mid-range wavelengths are predominant within sunlight, and the same stone will therefore appear more greenish after moving outside.

It should be noted that specimens that undergo a very minor change within a single hue (e.g. red to pinkish-red) are instead known as color-shift gemstones.

<<   Previous
Next  >>   [ Page 1 of 1  ]   [ 1  / 1 ]

<<  Previous
Next  >>   [  Page 1 of 1 ]

  Category List

Learn more about Gemstones
  Our Policy
Price Index
Gemstone Enhancement Codes
  Customer Services
Contact Us
  About Gemwow.com
AIGS Thailand
Jewelry Trade Center