струмінь, струменевий (принтер); гагат (чорний близкучий мінерал), гагатовий

Приклади використання слова «jet»:

One hand remained poised, weighted with the jet tresses.
All along its twisting course two broad bands of jet margined the cerulean shore.
There was a sharp jet of flame, acrack, and a scream.
Now the quivering jet of the flame grew visible.