The European Space Agency made Lego bricks out of meteorite dust!

Seriously. This is a proof of concept that building materials can be made out of lunar regolith. They ground up a 4.5 billion year old asteroid chunk, mixed it with presumably some sort of epoxy slurry, and formed them into viable Lego bricks, and built some simple structures out of it. Genuine Lego - the Lego corporation was involved in making them.

The article shows fourteen 2x4 bricks in a case, the article wasn't clear how many bricks were made, though they'll be on display in fifteen cities, so we know the minimum. I REALLY hope they have a guard posted at the stores throughout their exhibition!

And yes, all the bricks are space gray.

The bricks are on display at Lego locations:
USA
The LEGO Store, Mall of America, Bloomington, Minnesota
The LEGO Store, Disney Springs, Florida
The LEGO Store, Water Tower Place, Chicago
The LEGO Store, Disneyland Resort, California
The LEGO Store, 5th Avenue, New York

Canada: The LEGO Store, West Edmonton

UK: The LEGO Store, Leicester Square, London

Germany:
The LEGO Store, München Zentrum
The LEGO Store, Cologne

Denmark:
The LEGO Store, Copenhagen
LEGO House, Billund

Spain: The LEGO Store, Barcelona
France: The LEGO Store, Paris
Netherlands: The LEGO Store, Amsterdam
Australia: The LEGO Store, Sydney

https://www.engadget.com/lego-made-bricks-out-of-meteorite-dust-and-theyre-on-display-at-select-stores-161440194.html

https://www.lego.com/en-us/space/article/lego-space-bricks-moon