Light yellow or grey appearance.Releasing negative ions and far infrared ray.

PRODUCTION FEATURES:

Appearance: light yellow color.Granule sizes: D50≥0.5um.Mohs hardness:7.5.Amount of negative ion releasing: above 500PCS/ cm3 /S.Far infrared ray radiation rate: ≥0.85(50°C)Specific surface area: ≈60m2/gThermostability: ≥985°CAqueous PH value: 7.0±0.2

tourmaline powder