The crafting guide says

The members only Onyx gem is obtained by collecting 2,700,000 Tokkul and buying it in the Tzhaar Gem and Ore shop. This cost can be reduced by using the Karamja gloves one, a reward from the Karamja Achievement Diary.

This no longer works, I have karmaja gloves 2 which means I have bonuses that karmaja gloves one offer and more. After equipping karmaja gloves 2 and checking the price of the onyx it stays the same (2.7m tokkul), i am currently working to buy an onyx which is how i discovered this.

Didn't they take out the shop reduce costs from the gloves when they did the overhaul a while back?

 

The diary guide certainly no longer states it as a reward.

true i was just letting you know to take it out of the crafting guide

I do recall that, I've removed that one statement from the guide to avoid confusion. Thanks for mentioning this, I've credited you. ;)

 

- Speedyshel