Lightly charred -[ HMM ]-

One match, lit with a range burner flame then quickly extinguished. If you zoom in, you'll notice sparkles of color; I cannot confirm whether it's the nature of the phosphor or a photographic artifact.

 

Unfortunately, these matches are of limited usefulness. Neither of the two striking surfaces (one shown in another Macro Mondays contribution from several years earlier) work; the surfaces may have been contaminated.

 

Done