Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Scratch hardness
Table title:

Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=2 rowspan=1 > Material </th><th colspan=1 rowspan=1 > Mohs' scale </th><th colspan=1 rowspan=1 > Ridgway's scale </th><th colspan=1 rowspan=1 > Wooddell's scale </th></tr>
<tr> <td colspan=2 rowspan=1 > talc </td><td colspan=1 rowspan=1 > 1 </td><td colspan=1 rowspan=1 > 1 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=2 rowspan=1 > gypsum </td><td colspan=1 rowspan=1 > 2 </td><td colspan=1 rowspan=1 > 2 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=2 rowspan=1 > calcite </td><td colspan=1 rowspan=1 > 3 </td><td colspan=1 rowspan=1 > 3 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=2 rowspan=1 > fluorite </td><td colspan=1 rowspan=1 > 4 </td><td colspan=1 rowspan=1 > 4 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=2 rowspan=1 > apatite </td><td colspan=1 rowspan=1 > 5 </td><td colspan=1 rowspan=1 > 5 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=2 rowspan=1 > orthoclase </td><td colspan=1 rowspan=1 > 6 </td><td colspan=1 rowspan=1 > 6 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=2 rowspan=1 > vitreous silica </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 7 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=2 rowspan=1 > quartz </td><td colspan=1 rowspan=1 > 7 </td><td colspan=1 rowspan=1 > 8 </td><td class="highlighted"  colspan=1 rowspan=1 > 7 </td></tr>
<tr> <td colspan=2 rowspan=1 > topaz </td><td colspan=1 rowspan=1 > 8 </td><td colspan=1 rowspan=1 > 9 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=2 rowspan=1 > garnet </td><td colspan=1 rowspan=1 > 8.92 </td><td colspan=1 rowspan=1 > 10 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=2 rowspan=1 > corundum </td><td colspan=1 rowspan=1 > 9 </td><td colspan=1 rowspan=1 >  </td><td class="highlighted"  colspan=1 rowspan=1 > 9 </td></tr>
<tr> <td colspan=2 rowspan=1 > fused zirconia </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 11 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=2 rowspan=1 > fused alumina </td><td colspan=1 rowspan=1 > 9.03–9.065 </td><td colspan=1 rowspan=1 > 12 </td><td colspan=1 rowspan=1 > 10 </td></tr>
<tr> <td colspan=2 rowspan=1 > tungsten carbide </td><td colspan=1 rowspan=1 > 9.09 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 12.0 </td></tr>
<tr> <td colspan=2 rowspan=1 > silicon carbide </td><td colspan=1 rowspan=1 > 9.13–9.17 </td><td colspan=1 rowspan=1 > 13 </td><td colspan=1 rowspan=1 > 14.0 </td></tr>
<tr> <td colspan=2 rowspan=1 > boron carbide </td><td colspan=1 rowspan=1 > 9.32 </td><td colspan=1 rowspan=1 > 14 </td><td colspan=1 rowspan=1 > 19.7 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=3 > diamond </td><td colspan=1 rowspan=1 > carbonado </td><td colspan=1 rowspan=1 > 9.82 </td><td colspan=1 rowspan=3 > 15 </td><td colspan=1 rowspan=1 > 36.4 </td></tr>
<tr> <td colspan=1 rowspan=1 > ballas </td><td colspan=1 rowspan=1 > 9.99 </td><td colspan=1 rowspan=1 > 42.0 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > bort </td><td colspan=1 rowspan=1 > 10 </td><td class="highlighted"  colspan=1 rowspan=1 > 42.4 </td></tr>
</table>
Question:
What are Wooddell's scale values for quartz, corundum and diamond bort?
Answer:
Wooddell's scale value is seven for quartz and nine for corundum, and 42.4 for diamond bort.