Table 2. Micro Hardness.
| Indentation Test | 100 g (MPa) | 200 g (MPa) |
|---|---|---|
| Vegetable Ivory (Jarina) | ||
| —Transverse Plane | 124 ± 25 | 129 ± 17 |
| —Radial Plane | 100 ± 35 | 103 ± 33 |
| Elephant Ivory11 | ||
| —Circumferential Plane | 390 | 350 |
| —Radial Plane | 310 | 270 |
The errors provided for vegetable ivory represent the 1.96 times the standard deviation. The elephant ivory data11 mention that their maximum standard error is less than 12%.