The Difference Between White Opal and Crystal Opal

Though they may look similar at times, white opal and crystal opal have distinct differences. 

This big difference boils down to two main characteristics; translucency and transparency. 

Crystal opal

Crystal opal are defined by their translucency—light passes through the gem, creating a luminous, layered effect that gives the play of color remarkable depth and dimension. On the body tone and brightness scale they can sit anywhere between N1 and N9, either showing a dark or lighter tone. They typically showcase brighter colors in comparison to white opal, due to having a glass-like complexion that produces a 3D color-on-color effect.

This is because crystal opals are semi-transparent meaning that they look almost glass-like with no milky or frosted tint.

White opal

White opal sit between N7 and N9 on the body tone and brightness scale, and is the lightest opal you can get. Although it can look similar to a crystal opal at times, white opal have a translucent body tone that looks milky or like frosted glass which can result in a softer color brightness.

As with all opal, grading can be subjective. There can be a fine line between crystal opal and white opal – both could be N8 on the body tone scale and then it becomes a matter of opinion. The body tone and brightness scale is only to be used as a guide. At the end of the day, if the gem speaks to you, that's what counts the most!