2 steps can help you make this earring:
step1: string beads into a tree shape
step2: attach on the earring hook

the tools you should prepared:
Abacus Glass Bead (12mm, 8mm, 6mm)
Cube Glass Bead (4mm)
Bicone Glass Bead (4mm)
Earring Hook
Headpin
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lovehobbycraft, DIY what you want.