set of 12 ebony black stem crystal flute champagne glasses, vintage Luminarc France

Set of 12 ebony black / clear glass champagne flutes, 80s or 90s vintage. These are about 8 3/4" tall.

I think these are Luminarc (made in France) though I didn't see markings on any of them. All are in very good condition, no chips or damage, very gently used.