How to complete gem collector challenge

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The game says that you have to find 10 different gems to complete this challenge.
I have collected the following gems:
- blue topaz
- diamond
- rainbow gem
- ruby
- smoky quartz
- yellow sapphire
- alabaster
- amethyst
- citrine
- jade
- lapis lazuli
- quartz
- septarian nodule
- soulpeace
- tiberium
- bloodstone
- smithsonite
- emerald
which is over 10 however it says that I have only collected 2 gems, (4% completed).
Am I missing something?
I still haven't gotten the heart-shaped cut yet to master inventor.
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The Gem Collector Quick Trophy Guide | Easy $3 Platinum Game
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Images: Karolina Grabowska, Son Tung Tran, Uzunov Rostislav, Jonny Lew