|Optical Character||Uniaxial+ Double Refractive|
Linobate (LINE-oh-bate) is the commercial name for the manmade material lithium metaniobate, for which the formula is LiNbO3. This material is produced in colorless boules, as well as in a number of colors resulting from the dopant used in the manufacturing process, as follows
|Cobalt||Blue or violet|
|Nickel or Manganese||Yellow|
Linobate has potential as a popular gem because of its very high
dispersion (almost three times that of diamond) and its range of possible
colors. However, its fairly low hardness of 5 1/2 is a distinct disadvantage. In
faceting linobate, boules must be oriented carefully for best results.