Samenstelling van lava in % per kiloproduct
| Siliciumdioxide | S i02 | 40-45 | ||
| Aluminiumoxide | Al203 | 11-15 | ||
| Calciumoxide | Ca0 | 10-15 | ||
| IJzeroxide | Fe203 | 10-12 | ||
| Magnesiumoxide | Mg0 | 2,9-7,1 | ||
| Koolstofdioxide | CO2 | 1 | ||
| Titaandioxide | Ti02 | 2-3 | ||
| Fosforpentoxide | P205 | 0,4-0,8 | ||
| Zwaveldioxide | S03 | 0,06-0,07 | ||
| Chloor | Sl | 0,1 | ||
| Kaliumoxide | K20 | 2,9-5,0 | ||
| Natriumoxide | Na02 | 4 | ||
| Koper | CU | 28-50mg/kg. | ||
| Nickel | Ni | 60-71mg/kg. | ||
| Chroom | Cr | ca.115mg/kg. | ||
| Zinc | Zn | 50-60mg/kg. | ||
| Borium | B | 13-17mg/kg. | ||
| Kobalt | CO | 28-32mg/kg. | ||
| Selenium | Se | ca.20mg/kg. |