What you need.
3D Crystal Lacquer UV
Gem Particle
Jewelry Finding
Black Color Marker (Solvent Base)
Tooth Pick
UV Light (Can be substituted with Sun Light)

Remove Liner Shield from Cap Spout of 3D Crystal Lacquer UV

Cut off the tip of Spout

Mark Black inside of Metal Finding with Solvent Base Marker

Apply moderate amount of 3D Crystal Lacquer-UV in Metal Finding.

Sprinkle enough Gem Particles over the applied 3D Crystal Lacquer UV

Use tooth pick to flatten Gem Particles.

Place Finding in to UV Light to cure. Let it sit for about 2 ~ 3 minutes.

In order to lay Jewelry Finding flat vertically, put it on the raiser such as stock of paper.

Apply 3D Crystal Lacquer-UV to completely fill in Metal Finding

Put it in UV light to Cure. Let it sit for about 3 minutes.

You are done. Enjoy completed Jewelry Finding to add with your fashion Accessories.