Here are two variations on standard five and six pointed star cut gemstones. These designs feature frosted or unpolished facets that make the stars stand out. You’ll find these are more effective than most star cut designs, since the stars will not get lost in the reflections. They’re always easy to see, and you’ll get lively gems with plenty of conventional brilliance.
I designed these variations years ago, then lost them to a computer crash. I’ve recreated them from memory and had them cut again (so I wouldn’t have to rely just on my memory for how they performed). The designs were cut in a sky blue topaz and a fairly dark tourmaline.
Recommended Gems For Frosted Star Cut Designs
The topaz came out beautifully. The gem had brilliance all the way across the top and the star was exceptionally visible. The tourmaline was a disappointment. It was so dark after faceting that it took a lot of light to see the design. I recommend using these designs (at least, as they are written) only on light and medium saturated gems. If you have a large and dark gem that needs a shallow cut, apply the “keep your distance rule” and lower the angles as much as you need. Since you’re cutting to show off the star, it will be effective even if the gem windows.
Frosted Facet Cutting Advice
Take special care when cutting the frosted facets. All you’re doing here is removing a small amount of material off a facet edge. It’s really easy to over cut these facets! I recommend that you do them on a stationary (not turning) 1,200 lap. It only takes a few gentle wipes to cut them to size.
5 Star Gem, Five Pointed Star Cut Variation, 81 Facets, 64 Index
This design doesn’t have perfect five-way symmetry, but can you tell?
The only trick to cutting this gem is the final row of frosted facets. These are so small that the best way to cut them is on a stationary, 1,200 lap. Just give the motionless lap a short wipe, then inspect your facet. Be gentle. They take very little cutting.
|2||46.5º||03-10-16-23-29-35-41-48-54-61||Create Level Girdle|
|3||42º||01-12-14-25-27- 37-39-50-52-63||Main Facets|
6 Star Gem, Six Pointed Star Cut Variation, 85 Facets, 96 Index
This six sided star has frosted facets outlining the design. As with the 5 Star Gem, the only trick to cutting this gem is the final row of frosted facets. These are so small that the best way to cut them is on a stationary, 1,200 lap. Just give the motionless lap a short wipe, then inspect your facet. Be gentle. They take very little cutting.
The crown will need a little adjusting during the pre-polish stage to keep the facets evenly proportioned as in the diagram. A step-cut crown, with 35º mains, would be as good or maybe a little better as far as brilliance. I wanted to suggest this as an alternative.