OKDEU f.. YELLOW MINEHAL-ftESIN. 57 



Cleavage, P, very difficult. Fracture conchoidal. 

 Surface, P oo rough and curved, P 1 

 rough, P and [P -f- oo] smooth and shining. 



Lustre resinous, inclining to vitreous. Colour honey- 

 yellow, inclining often to red or brown. Streak 



. white. Transparent ...translucent. 



Sectile. Hardness = 2-0... 2-5. Sp. Gr. = 1-597. 



Compound Varieties. Small massive nodules : 

 composition granular, 



OBSERVATIONS. 



1. According to KLAPROTH, the present species con- 

 sists of 



Alumina 1C -00. 



Mellitic Acid 46-00. 



Water 33-00. 



It loses colour and transparency, when exposed to the flame 

 of a candle, and is soluble in nitric acid. 



2. It does not frequently occur in nature, as there is only 

 one well authenticated locality of it, Artern in Thuringia, 

 where it is found in a bed of brown coal, which is nearly 

 earthy, sometimes accompanied by small crystals of pris- 

 matic Sulphur. It has been quoted from Switzerland. 



Grans II. MINERAL-RESIN. 



1. YELLOW MINER AL-RESIN. 



Yellow Mineral Resin or Amber. JAM. Syst. Vol. III. 

 p. 470. Man. p. 297. Amber. PHILL. p. 373. Bern- 

 stein. WERX. Hoffm. H. B. III. 1. S. 324. Born- 

 stein. HAUSU. I. S. 92. Bernstein. LEOXH. S. C64. 

 Succin. HATTY. Traite, T. III. p. 327. Tabl. comp. 

 p. 71- Traite, 2de Ed. T. IV. p. 4?3. 



Irregular forms, grains and spheroidal masses. 



