| pearl (scientific name: pinctada fucata) 3.01 g, mother of pearl shell (scientific name: nacre) 2.7 g, abalone shell (scientific name: haliotidae) 1.8 g, black onyx: 3 g |
| pearl (scientific name: pinctada fucata) 3.01 g, mother of pearl shell (scientific name: nacre) 2.7 g, abalone shell (scientific name: haliotidae) 1.8 g, black onyx: 3 g |