You read the entry for the colour-change sapphire. The entry reads:

"Colour-Change Sapphire: Also known as chaos sapphire. Vitreous. No definite colour, depends on current elemental property. Very high hardness. Elemental property changes continuously with no observable pattern.

Magical property: Internal. Casts an elemental blast ward upon radial impact. Trigger radius relative to volume. Force relative to energy. (Variation of the sapphire. For more information about the sapphire, see entry: Sapphire.)

Can be enchanted with air, earth, fire and ice magic. Prevents from assuming opposite element.

Acknowledged sources: Hollow Shades, Dayspring Region; Everfree Forest, Everfree Region. Very rare. Theorized to form near sources of chaos magic."

You notice that Moonflower has fallen asleep against you.

The clock on the wall indicates a quarter past three.