Quartz crystal clump
by AuntDaisy, published
This is a stylised clump of quartz crystals. Real quartz crystals don't grow in quite this way, but it looked prettier...
It's crying out to be hollowed and filled with LEDs - or lit from below with a torch. Or, it could hold postcards/photos, go on the top of Christmas tree, annoy the cat, or a hundred and one other uses.
I've included the OpenSCAD script to allow you to create your own - you can change the crystal facets, do proper twinning (Brazil, Japan...), scale, rotate, mirror, translate, duplicate to your heart's content.
There's also an STL for a single crystal of quartz (commented out in the OpenSCAD file) which is scaled by x15.
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For the Replicator, I used the default accelerated printing settings for ABS - 10% infil, 1 shell, 80mms/s feedrate, 150mm/s travel feedrate, 230°C print temperature, 110°C heated build platform. This should print without the need for support - there is a very tiny bit of overhang at the base of the six middle sized crystals. The STL file prints at ~9cm tall, but should scale up or down.