Sharing a model i enjoy
found at https://www.thingiverse.com/thing:3114380
profile is setup exactly how i print. adaptive layer heights.
I currently have the infil set to lightning for the center crystal piece so when printed in clear filament has more of a gem effect.
You can also print it in vasemode to make it hollow.
The file is setup to allow for a light installation under the gem.
Do not use supports, it prints great just as it sets, just change the infil pattern.