At least the things on my list would dazzle anyone!

1: Translucent or transparent rhodochrosite mineral sample.


2: Cat's eye Alexandrite. Strong color change.


3: Mandarin orange spessartite garnet.


4: Paraiba tourmaline.


5: Trilobite fossil (not a casting) with intact eye stalks.


6: Unheated & untreated padparadscha star sapphire.


7: Amber (not copal) with an insect inclusion. Insect must be the size of a honeybee or larger.


8: Lightning ridge black opal displaying all the colors of the rainbow. Blues and greens should be balanced by reds.


9: Russian demantoid garnet with horsetail inclusions.


10: Color change garnet.