- diamonds on dark surface: https://www.pexels.com/photo/diamonds-on-dark-surface-5442447/ by The Glorious Studio
- recolored to form different gemstones
- unnamed pearl earing: https://www.pexels.com/photo/close-up-photo-of-a-pearl-earring-9428779/ by cottonbro
- unnamed pear-cut purple gemstone: https://unsplash.com/photos/7ZmtUtAArRI by Conscious Design
- blue emerald cut tanzanite gemstone: https://unsplash.com/photos/Talnaz9Bug0 by Sabrianna
- "ghost" - geometric kalidoscope drawing: by Pyrrhic Silva (Jake)
- unnamed blue-orange iris: https://unsplash.com/photos/B0zAPSrEcFw by Victor Freitas
- unnamed brown iris: https://unsplash.com/photos/JC61bV2B4zA by Dalea Jerielle
- blue eye: https://unsplash.com/photos/Z-5i0RVukdU by Egor Vikhrev
- unnamed brown iris: https://www.pexels.com/photo/close-up-photo-of-right-person-eye-1435823/ by Engin Akyurt
- unnamed redish iris: https://www.pexels.com/photo/close-up-photo-of-an-eye-2729528/ by Paula Neumeyer
- unnamed light blue iris: https://www.pexels.com/photo/close-up-photo-of-right-person-eye-1435823/ by Наталья Кленова
- Iris of Scotty: photo taken by Scotty with express permission to appear in this game.
- Iris of The One Behind You: photo taken by The One Behind You with express permission to appear in this game.
- flipCard: https://pixabay.com/sound-effects/flipcard-91468/ by Splashdust
- Good!: https://pixabay.com/sound-effects/good-6081/ by syseQ
- collect: https://pixabay.com/sound-effects/collect-5930/ by Wagna
- Sad Trumpet: https://pixabay.com/sound-effects/sad-trumpet-46384/ by rcniclas
- Button: https://pixabay.com/sound-effects/button-124476/ by StudioAlivioGlobal
- Interface: https://pixabay.com/sound-effects/interface-124464/ by StudioAlivioGlobal