  In a consortium analysis of a large particle captured from the coma of comet
81P/Wild 2 by the Stardust spacecraft, we report the discovery of a field of
fine-grained material (FGM) in contact with a large sulfide particle. The FGM
was partially located in an embayment in the sulfide, so appears to have been
largely protected from damage during hypervelocity capture in aerogel. Some of
the FGM particles are indistinguishable in their characteristics from common
components of chondritic-porous interplanetary dust particles (CP-IDPs),
including glass with embedded metals and sulfides (GEMS) and equilibrated
aggregates (EAs). The sulfide exhibits surprising Ni-rich lamellae, which may
indicate that this particle experienced a long-duration heating event after its
formation but before incorporation into Wild 2. We discuss the relationship of
the FGM to the sulfide, to other Wild 2 particles and to the history of the
Solar nebula.
