66 A SYSTEM OF 



rings, under the name of Occbi di Gattt^ 

 which, however, ought not to be con- 

 founded with the pieudopal, (Sec\ lvi.) 

 or cat's-eye. 



SECT. LVIII. 



'4. The Chalcedony, or white agate. 



I a flint of a white colour, like milk di- 

 luted with water, more or lefs opaque : it 

 has veins, circles, and round fpots. It is faid 

 to be fofter than the onvx, but much harder 

 than thofe agates which are fometimes found 

 of the fame colour, 



a. The white opaque Chalcedony, or Cacho- 

 hngy from the Buckarifh Calmucks. This 

 was firft made known by one Renez, a 

 Swedifh officer, who for feveral years had 

 been in that country. The inhabitants 

 find this flint on the banks of their rivers, 

 and work idols and domeftic veilels out 

 of it. 



b. Of white and femi-tranfparent ftrata, from, 

 Ceylon. 



S. Bluifh grey, from Ceylon and Siberia^ 



SECT. LIX. 



5. The Carnelian, Carniolus, 



Is of a brownifh. red colour, and often en- 

 tirely brown. Its name is originally derived 

 ; from its refemblance to flefh, or to water 

 mixed with blood. 



a. Red, from the Eaft, and Turky. 



b. Yellowifh brown, looks like yellow am- 

 ber, from the river Tomm, in Siberia,, 

 It is faid not to be fo hard as the Chal- 

 cedony, 



SECT. 



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