Rubellite Buying and The Four Cs
Sellers often misrepresent rubellite color. True rubellite colors range from a medium to dark saturated red/red, red/purple, to red/purple/very slight peach. Think raspberry, like the fruit.
Personally, I would grade a red/purple/very slight peach stone as a little less valuable. However, some people really like the peach tone. I think it’s OK but just not a top rubellite color.
Ideally, look for a pure red/purple/pink to red/red/purple/pink stone with minimal color shift (peach). At some point, hot pink/red/purple becomes intense enough to qualify as rubellite. You can have difficulties judging this often borderline color. Generally, I think the stone should be intense and more red/purple then pink/purple. I’ll often grade a stone hot pink/rubellite when I think it’s borderline.
Keep in mind that natural, untreated rubellites have a very slight to strong peach shift in incandescent light. Depending on the amount of shift, I would grade a stone a little lower as it becomes more peach. (Again, this is my…