▁the ▁N og u era ) ▁and ▁Cam ar asa ▁( just ▁above ▁the ▁confl u ence ▁with ▁the ▁Seg re ). ▁ ▁See ▁also ▁▁ ▁List ▁of ▁rivers ▁of ▁Spain ▁ ▁Cab d ella ▁L akes ▁Tal arn ▁Dam ▁ ▁Category : E bro ▁bas in ▁Category : R ivers ▁of ▁Spain ▁Category : R ivers ▁of ▁Catal onia ▁Category : P all ars <0x0A> </s> ▁Art ific ial ▁stone ▁is ▁a ▁name ▁for ▁various ▁synth etic ▁stone ▁products ▁produced ▁from ▁the ▁ 1 8 th ▁century ▁on ward . ▁Us es ▁include ▁stat u ary , ▁architect ural ▁details , ▁f encing ▁and ▁rails , ▁building ▁construction , ▁civil ▁engineering ▁work , ▁and ▁industrial ▁applications ▁such ▁as ▁gr ind st ones . ▁ ▁History ▁ ▁One ▁of ▁the ▁earliest ▁was ▁Co ade ▁stone ▁( origin ally ▁called ▁Lith od ip y ra ), ▁a ▁cer am ic ▁created ▁by ▁Ele an or ▁Co ade ▁( 1 7 3 3 – 1 8 2 1 ), ▁and ▁produced ▁from ▁ 1 7 6 9 ▁to ▁ 1 8 3 3 . ▁Later , ▁in ▁ 1 8 4 4 , ▁Frederick ▁R ans ome ▁created ▁a ▁Pat ent ▁Sil ice ous ▁Stone , ▁which ▁compr ised ▁sand ▁and ▁pow der ed ▁fl int ▁in ▁an ▁al kal ine ▁solution . ▁By ▁he ating ▁it ▁in ▁an ▁en closed ▁high ▁temperature ▁steam ▁bo iler ▁the ▁sil ice ous ▁particles ▁were ▁bound ▁together ▁and ▁could ▁be ▁m ould ed ▁or ▁worked ▁into ▁filtering ▁sl