Table 1. Scoring scheme as offered by Hampton Research (http://www.hamptonresearch.com).
There are nine classes, so that only a single digit is needed to record a score. The score number reflects the importance of the category for finding harvestable crystals.
| Score | Description | Superclass |
|---|---|---|
| 1 | Clear Drop | Clear |
| 2 | Phase Separation | Other |
| 3 | Regular Granular Precipitate | Precipitate |
| 4 | Birefringent Precipitate or Microcrystals | Crystal (or Precipitate) |
| 5 | Posettes or Spherulites | Other |
| 6 | Needles (1D Growth) | Crystal |
| 7 | Plates (2D Growth) | Crystal |
| 8 | Single Crystals (3D Growth < 0.2 mm) | Crystal |
| 9 | Single Crystals (3D Growth > 0.2 mm) | Crystal |