Read the directions supplied with your specific adhesive and test the complete material combination on a hidden area or spare sample.
Create a sorting map
Reserve one tray row for each size and write a short label beside it. Only after the sizes are separated should you divide colours. This prevents a similar-looking small and medium stone from being mixed into the same design pile.
Build a small working palette
Do not pour every compartment onto the work surface. Pick the colours and sizes needed for one motif and place them in a shallow tray. Keep the main storage case closed so a dropped stone has a clear place to return.
Use size for visual hierarchy
Large stones can define a letter, flower or centre point. Medium stones can form the main rhythm, while small stones finish corners and narrow gaps. Test the combination on paper first; a balanced palette usually looks more intentional than using every colour at once.
Count a sample before scaling up
Measure one repeat or one square inch of the design, then estimate the total with a small allowance for sorting and mistakes. Mixed-size kits are useful for variety, but a large single-colour field may need additional stones beyond the starter box.
Quick checklist
- Separate size before colour
- Work from a small palette
- Assign each size a visual role
- Estimate from a real sample