Scheelite, named for Swedish chemist C.W. Scheele is a calcium tungstate, a major source of tungsten. Most scheelite is fluorescent and ranges from blue to white in color. Spectacular, transparent crystals come from Austria, Italy, Brazil, Rwanda, and Colorado. Scheelite crystals often have high luster and fire that is almost adamantine.
- Optical Properties
- Characteristic Physical Properties
- Chemistry & Crystallography
Color due to neodymium. The intense broad band in the yellow dominates the spectrum as is often the case with lab created stones doped with neodymium. When the darker ray is polarized the three lines centered at 525nm. are of equal intensity.
The intense broad band in the yellow dominates the spectrum as is often the case with lab created stones doped with neodymium. As the spectrum of this lighter ray is isolated by a polarizing filter, note the three lines in the green centered at about 525 nm. in which the one on the long wave side is fainter than the other two.
Spectrum due to neodymium. The main feature in this spectrum is the group of seven lines in the yellow area between 575nm. and 595nm. which is typical of neodymium content. In some specimens two other groups may be seen, one in the green and one in the blue, but these are fewer in number, weaker, and more difficult to detect.
Spectrum due to neodymium. The main feature in this spectrum is the group of seven lines in the yellow area between 575nm. and 595nm. which is typical of neodymium content. All the lines in the group in the yellow are seen in equal intensity without any dominant lines. In some specimens two other groups may be seen, one in the green and one in the blue, but these are fewer in number, weaker, and more difficult to detect.
We acknowledge the significant scientific contributions of John S Harris, FGA to the study of gemstone spectra and with deep appreciation to him, acknowledges the use of his images and related notes about gemstones and their spectra in the educational materials on this website.
Countries of Origin
Myanmar; Cambodia; Sudan; Malaysia; Kazakhstan; Portugal; Bosnia And Herzegovina; Armenia; Greece; Austria; Mongolia; Mozambique; Korea (the Republic of); Morocco; Unknown; Mali; Brazil; Guatemala; Guyana; Algeria; Chile; Colombia; Ecuador; Argentina; Iran (Islamic Republic of); Hungary; Republic of Kosovo; Japan; Ukraine; Congo; Bolivia (Plurinational State of); India; New Zealand; Canada; Turkey; Belgium; Namibia; Finland; Italy; South Africa; Antarctica; Georgia; Peru; Venezuela (Bolivarian Republic of); Germany; Tanzania, United Republic Of; Afghanistan; Russian Federation; Viet Nam; Czechia; United States of America; Egypt; Madagascar; Thailand; United Kingdom of Great Britain and Northern Ireland; Saudi Arabia; Sweden; Pakistan; Malawi; China; Ireland; Poland; Slovakia; Bulgaria; France; Serbia; Kyrgyzstan; Cote D'Ivoire; Bhutan; Romania; Niger; Sri Lanka; Philippines; Rwanda; Uzbekistan; Switzerland; Spain; Cuba; Burkina Faso; Mauritania; Norway; Swaziland; Congo (the Democratic Republic of the); Mexico; Uganda; Zimbabwe; Australia; Greenland; Tajikistan; Indonesia
Gentle care, not suitable for jewelry