This round rock, with it's crystal lining, is a geode

[PGalbe]

Cette "boule" de "roche" avec un "doublage" de cristaux à l'intérieur, est une géode.
Mutiple questions.
Would it be a "boule" (ball) or a "bulle" (bubble) ?
Would it be a "roche" (substance) or a "pierre" (stone) ?
Would the lining be "doubleur" or "doublage" or "paroi" ?

 

[Flynnzane]

un minéral
une pierre
some expert in minéraux...
lining

 

[gardian]

http://en.wikipedia.org/wiki/Geode

Lisez cette page d'abord.

 

[pyan]

PGalbe, you seem to be translating from English? Please would you give the original sentence in English .

(I'm adding a tag or two to the thread.)

 

[belgian teacher]

In French, we also use the word géode

http://fr.wikipedia.org/wiki/G%C3%A9ode_(minerai)

 

[PGalbe]

Oops. Sorry. Yes...I'm trying to say
"This round rock, with it's crystal lining, is a geode".
And the "round rock" is referring to the dark basalt, on the outside (not the quartz crystals or chalcedony on the inside).

 

[belgian teacher]

Cette pierre ronde, tapissée de minéraux cristallisés, est une géode.

 

[PGalbe]

Oooh. Tapissée. I like that. A fanciful description.
Many thanks.

 

[soc]

oui, pour rester dans les chiffons on aurait pu dire aussi :
cette pierre ronde à la doublure de cristal est une géode.
cette pierre ronde à la doublure cristalline est une géode.

 

[PGalbe]

Thank you. I like the use of "doublure" also, for "lining".