IS« earths. SIIICEOUS. 50. areohfus. 51. Amaroi, 
50, CfRCONIUS, Confifting of fillra, a more 
than double proportion of circonia, and a very 
fmall quantkv of metallic oxyde, partly of iron 
partly of nickel: very hard, ponderous, imitat- 
ing the diamond in its kiftre, parafitical, foliated 
with the foliations incurved, cryflallized; not 
fufibk per fe. 
ClHCONlUS. 
Jargon. Kivvjan mimyal. t. p. JJJ, 
Zircow, Jargon, tichmei/itr mntr. %, p. ^ 6 . 
Zir(;oii, Jargon. ’Ibemfon thtm, 5, f, J25. 
found in Ceylon, in ftna!! irregular grains, or crySallized in 4' 
lided reclangttlar prifins terminated each fide by a 4-lideii 
pyramid, or in dottble 4 ficled pyramids ; colour grey, 
greenifh, yeHowifli-brown, reddiili -brown, or violet; W 
ftrongly femitranfparenr, fometimes opake : it feratebes 
gtafs, and is not altered by the hea,t in which the diamond i» 
confumed: fpecific gravity 4,416. contains zirconia 68,0. 
filka ji,5. ifickcl and iron 0,5, Kluproth. 
p. AMARUS. Confifting of filtca, a fmaller 
proportion of magnefia, a very final! quantity of 
alumina and carbonate of lime, and 10 per cent, 
of oxyde of iron: hard, tenacious, fubopake, a 
little greafy, green, of a fplintery texture, break- 
ing into indeterminate fragments, of a common 
form : not fufiblc per fe. 
Amarus. 
Iloepfner magoz. Na‘ur. Heh/et. ». p. zjy.' 
Jafpis unicolor. f-FulJ. JjJi. min. i.p. 302. ». 4, 
Found in the Ea!i, Nevj Zealami, and the Hel-vetie and Suhandic 
mountain?, foraetimes detached, fomecimes forming vaft 
■ mafles : colour green with a call of blue, and in the promi- 
iienc point of the fragments^ inclining to milk-white. By the 
Inhabitants of the Ball and New Zealand h is fafhioned into 
various ornaments, vgHels and arms. 
