Hole number Price Item
1 5 G N
2 10 G N
3 100 G N
4 100 G Y(1)
5 200 G Y(2)
6 500 G Y(4)
Canaan allows you to perforate your equipment by a maximum of 6 holes (with increasing price per hole).

For the 1st 3 holes you'll only need to pay a certain sum of Gold, after that (4~6) you'll need Artisan's SoulItemicon 179 (ItemShop).

After you have made you hole, you can Inlay a gem in it.