Consistent

Band after even band — the same on Tuesday as it was on Monday.

Banded Agate · The Law of Procurement

Family: Chalcedony deposited in rhythmic layers
Hardness: 6.5–7 on the Mohs scale
Colour: Grey, white and cream in parallel bands
Signature: Each band is one cycle of silica-bearing water entering the cavity

The stone read as the word

An agate is a record of repetition: the same solution entering the same cavity again and again, each pass leaving a layer of near-identical thickness. Break one open and you can count the returns.

Consistency is levelling — evening a thing out until it is the same every time. This stone is the physical version of a kept routine.

What it is carried for

Carried to make today match yesterday on purpose.
Held for the practice that gets counted, not the burst that gets noticed.