Spectrum Vis-NIR reflectance spectrum of a pellet of 100% vermiculite (inf. 0.1 mm) Spectrum Vis-NIR reflectance spectrum of a pellet of 1% olivine (0.1-1 mm) and 99% vermiculite (inf. 0.1 mm) Spectrum Vis-NIR reflectance spectrum of a pellet of 5% olivine (0.1-1 mm) and 95% vermiculite (inf. 0.1 mm) Spectrum Vis-NIR reflectance spectrum of a pellet of 10% olivine (0.1-1 mm) and 90% vermiculite (inf. 0.1 mm) Spectrum Vis-NIR reflectance spectrum of a pellet of 20% olivine (0.1-1 mm) and 80% vermiculite (inf. 0.1 mm) Spectrum Vis-NIR reflectance spectrum of a pellet of 40% olivine (0.1-1 mm) and 60% vermiculite (inf. 0.1 mm) Spectrum Vis-NIR reflectance spectrum of a pellet of 60% olivine (0.1-1 mm) and 40% vermiculite (inf. 0.1 mm) Spectrum Vis-NIR reflectance spectrum of a pellet of 80% olivine (0.1-1 mm) and 20% vermiculite (inf. 0.1 mm) Spectrum Vis-NIR reflectance spectrum of a pellet of 90% olivine (0.1-1 mm) and 10% vermiculite (inf. 0.1 mm) Spectrum Vis-NIR reflectance spectrum of a pellet of 95% olivine (0.1-1 mm) and 5% vermiculite (inf. 0.1 mm) Spectrum Vis-NIR reflectance spectrum of a pellet of 99% olivine (0.1-1 mm) and 1% vermiculite (inf. 0.1 mm) Spectrum Vis-NIR reflectance spectrum of a pellet of 100% olivine (0.1-1 mm)