| SPECIES | HEAT PER CORD (MILLION BTUS) | % OF GREEN ASH | EASE OF SPLITTING | SMOKE | SPARKS | COALS | FRAGRANCE | OVERALL QUALITY |
|---|---|---|---|---|---|---|---|---|
| Black locust | 27.9 | 140 | Difficult | Low | Few | Excellent | Slight | Excellent |
| Black walnut | 22.2 | 111 | Easy | Low | Few | Good | Good | Excellent |
| Bur oak | 26.2 | 131 | Easy | Low | Few | Excellent | Good | Excellent |
| Eastern red cedar | 18.2 | 91 | Medium | Medium | Many | Poor | Excellent | Fair |
| Honey locust | 26.7 | 133 | Easy | Low | Few | Excellent | Slight | Excellent |
| Larch (tamarack) | 21.8 | Easy-med | Many | Fair | Slight | Fair | ||
| Lodgepole pine | 21.1 | Easy | Many | Fair | Good | Fair | ||
| Maple (other) | 25.5 | 128 | Easy | Low | Few | Excellent | Good | Excellent |
| Mulberry | 25.8 | 129 | Easy | Medium | Many | Excellent | Good | Excellent |
| Osage orange | 32.9 | 165 | Easy | Low | Many | Excellent | Excellent | Excellent |
| Ponderosa pine | 16.2 | 81 | Easy | Medium | Many | Fair | Good | Fair |
| Red oak | 24.6 | 123 | Medium | Low | Few | Excellent | Good | Excellent |
| Rocky Mountain juniper | 21.8 | 109 | Medium | Medium | Many | Poor | Excellent | Fair |
| Silver maple | 19.0 | 95 | Medium | Low | Few | Excellent | Good | Excellent |
| Spruce | 15.5 | 78 | Easy | Medium | Many | Poor | Slight | Fair |
| Sycamore | 19.5 | 98 | Difficult | Medium | Few | Good | Slight | Good |
| White oak | 29.1 | 146 | Medium | Low | Few | Excellent | Good | Excellent |
| Willow | 17.6 | 88 | Easy | Low | Few | Poor | Slight | Poor |
| MINERAL | MOHS RELATIVE HARDNESS SCALE | SCRATCH TEST | OTHER FACTS |
|---|---|---|---|
| Talc | 1 | Scrapeable with fingernail | Used in talcum powder |
| Gypsum | 2 | Scrapeable with fingernail | Ingredient of plaster |
| Calcite | 3 | Scratch with copper coin | Used in cement |
| Fluorite | 4 | Scratch with a nail | Used in toothpaste |
| Apatite | 5 | Scratch with a nail | Mineral in bone |
| Feldspar | 6 | Scratch with steel file | Ingredient in glass, etc. |
| Quartz | 7 | Scratches window glass | Used in glass, etc. |
| Topaz | 8 | Scratches glass | Gemstone |
| Corundum | 9 | Scratches topaz | Rubies and sapphires |
| Diamond | 10 | Scratches corundum | “A girl’s best friend” |