Artifact or Modern?

[digsafe1]

 

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[nhbenz]

Looks a lot like a ceramic briquette from a gas grill
http://www.4seasonswgtn.co.nz/produ...media/p/ceramic-briquette-holder-330-x-425mm/

 

[AU Seeker]

Looks a lot like a ceramic briquette from a gas grill
Ceramic Briquette Holder 330 x 425mm :: 4seasons Wellington

That was my first impression, is it made of ceramic, metal, or other??