Modes:
Ultrasound: never.
Steam: never.
Warm water and
neutral soap: safe.
Stability
Reaction to heat: sharp changes in temperature can lead to breaking, cracking, or fracturing of the opal, excessive heating can change a white opal to brown and remove the colour effect.
Stability with light: relatively stable.
Reaction to chemical
agents: affected by hydrofluoric acid and corrosive alkalis.
No comments:
Post a Comment