(2 Color and "Spring Forward" Marbles do not cost extra, so if you just want one all you need to do is buy the model of your choice and leave a note)
3 Color Marbles - $5: 3 colors marbled together. 3 color marbles are imbalanced, some blending is likely - as with all options this is exacerbated with 0030. Pick a color you'd like, tell me which you definitely do not want so I can avoid them, I will fill in the blanks.
4 Color Marbles - $10: 4 colors marbled together. Imbalances and blending are inevitable. Pick a color you'd like, tell me which you definitely do not want so I can avoid them, I will fill in the blanks.
Painterly Marbles - $15: An effect that makes the swirls look a bit like paintbrush strokes. Best with monochromatic and matte colors, so ideally pick your preferred color and I'll get the right light/shadow for it. Some color mixing works okay, but I'd generally recommend against using colors on opposite sides of the wheel, and choosing tones that are not shimmery.
Pseudo-Transitional Marbles - $15: Less smooth than a Full-Transitional marble, but markedly easier on me and ought to reduce the time I take to get these things out. Translucent tones will appear to transition from one to the next with an offset-color marbled in. These are best in and will be done with shimmery transitioning tones. The offset looks best matte, but may also contain some shimmer.
Gamut - $20: An option for those wishing for All of the Colors. This is good for sunsets that run through the entire spectrum, bold vaporwave neons, holographic rainbows, etc. Let me know your particular inspiration in notes or an email. Unmarked trio picture is really just for some ideas, still looking for a more encompassing set of examples here.
If you purchase this listing without actually purchasing a toy I will stuff your mailbox full of overdone pasta, so please do not do that thing.