Thatcheria Mirabilis Shell Keychain

Meet a tiny shell with a big personality 🐚

This model is based on the beautiful Thatcheria mirabilis shell, originally sourced from the free Smithsonian 3D collection. I turned the shell shape into a small printable holder/keychain charm while keeping its natural, realistic shell look.

It is small, lightweight, and fun to print. The organic spiral shape gives it a very real seashell feeling, especially when printed in white, marble, silk, translucent, or warm orange filament.

Great for:

• Keychain charm
• Bag accessory
• Small decorative shell
• Gift print
• Ocean / beach themed collection
• Tiny useful 3D print

The model includes a small hole for a ball chain or keyring. It prints with a little tree support, easy to remove.

Source / Credit

Base shell model by the Smithsonian 3D model: Thatcheria mirabilis.
The Smithsonian page lists this media as public domain and free of copyright restrictions,

This is a remixed / adapted 3D-printable version made into a small holder/keychain.

Print Profiles Included

1. Regular PLA Profile -
   Ready-to-print PLA setup for standard printers.
2. PETG Ready Profile -
   Prepared for PETG printing for a stronger and more durable keychain.
3. PLA A1 Mini Profile -
4. A1 Mini ready setup, placed and prepared for easy printing.

Printing Notes

• Material: PLA or PETG
• Supports: Small tree supports required
• Supports are light and easy to remove
• Infill: 10–15% is enough
• Walls: 2–3 walls recommended
• Layer height: 0.16–0.20 mm works well
• Brim: Optional, recommended for PETG or if your bed adhesion is weak

For the best shell look, try white, marble, silk, translucent, orange or gradiant  filaments.

✨ Boost Me!
If you found this useful, consider boosting — it really helps support more free designs!