What feature, when found in a stony meteorite, serves as definitive proof of its origin from the earliest solar nebula condensation?

Answer

Chondrules

Chondrules are small, glassy, spherical inclusions; their presence in a stony meteorite is considered definitive proof of its space origin as remnants from the initial solar nebula.

What feature, when found in a stony meteorite, serves as definitive proof of its origin from the earliest solar nebula condensation?
MeteorSpacerockEarthdebris