How much does creating a beheaded cost?

[Firewarrior44]

Quote:

A spellcaster can create a beheaded with animate dead. Each beheaded created requires two onyx gems worth 100 gp and the casting of one air walk or fly spell. Beheaded can be created with additional abilities from the list below.

Does this mean 2 100 gold gems (200 total) or 2 gems worth a total of 100? Also does this replace the material cost of animate dead (25 gp onyx in this case) or is it in addition to it?

[Splendor]

Quote:

CREATlNG BEHEADED

A spellcaster can create a beheaded with animate dead. Each beheaded created requires two onyx gems worth 100 gp and the casting of one air walk or fly spell. Beheaded can be created with additional abilities from the list below. Creating a variant beheaded counts as I additional Hit Die toward the caster's maximum Hit Dice of controlled undead. For every two abilities added, increase the beheaded's CR by 1.

Poorly worded.

I would say two 50gp onyx gems (100gp total) and doesn't replace the normal cost (extra cost so it flies).