Typical Properties - "FishSprings" Perlite Ore - (Crude)| Form and Color | Gray, Granular |
| Specific Gravity | 2.5 |
| Loose Density | 65 lbs. per cubic foot |
| MOHS Hardness | 5 to 6 |
| pH | Neutral |
| Fusion Point | 1700 - 1800 F |
| Solubles - Water | 0.08 |
| Solubles - Hot Hcl (1:3) | 1.5 |
Typical Chemical Analysis %By Weight| Loss on Ingnition | 3.2 |
| SiO2 | 75 |
| Al2O3 | 13.2 |
| Fe2O3 | 0.7 |
| CaO | 0.5 |
| MgO | Trace |
| Na2O | 4.3 |
| K2O | 4.6 |
Typical Sieve Analysis - Percent Weight Retained, Cumulative| US Standard Sieve | 814 | 1220 | 1240 | 4500 | A-100 |
| 6 | 0-5 | - | - | - | - |
| 8 | 30-50 | 0-1 | - | - | - |
| 12 | 70-90 | 20-40 | 0-8 | - | - |
| 14 | - | - | 12-25 | - | - |
| 16 | 94-99 | 45-70 | 25-40 | - | - |
| 20 | 97-99 | 75-95 | 55-75 | t | - |
| 30 | 97-99 | 95-100 | 80-95 | 0-4 | - |
| 40 | - | 95-100 | 95-100 | 7-20 | - |
| 50 | - | - | - | 22-45 | - |
| 100 | - | - | - | 67-88 | 0-50 |
| 200 | - | - | - | 90-99 | 35-65 |