this function only return gems if there are on the item ?!

[todo]

https://github.com/Marsgames/GearHelper/blob/6c7deef0ff0de146bcfb14acfe06c24e6938d34b/#L571-L574

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This issue was generated by todo based on a TODO: comment in 6c7deef when #65 was merged. cc @Marsgames.