.201. OPTICAL PROPERTIES OF MINERALS. 289 



4. Honey -yellow. Yellow, with a little red and brown ; 

 the dark colour of honey. Ex. llhombohedral Lime- 

 haloide ; octahedral Fluor-haloide ; pyramidal Melichrone- 

 resin. 



5. Lemon-yellow. The purest yellow colour. Ex. Pris- 

 matoidal Sulphur, and the decomposed varieties of uncleav- 

 able Uranium-ore, called Urane-ochre. 



C. Ochre-yellow. Yellow, with brown. Ex. The varieties 

 of rhombohedral Quartz and of uncleavable Quartz, if 

 mixed with oxide of iron, from which this colour is derived. 



7- Wine-yellow. A pale yellow colour, with a little red 

 and grey. The colour of several sorts of white wine. 

 Ex. Prismatic Topaz from Saxony and from Asia Minor ; 

 octahedral Fluor-haloide. 



8. Cream-yellow. A pale yellow colour, with a little red 

 and very little brown. Rare. Sometimes in Lithomarge, 

 and Bolus from Strigau in Silesia. 



9. Orange-yellow. Yellow, very much inclining to red. 

 The colour of ripe oranges. Ex. Several varieties of pyra- 

 midal Lead-baryte from Hungary and Carinthia. 



G. Red. 



1. Aurora-red. Red with a great deal of yellow. Very 

 distinct in several varieties of hemi-prismatic Sulphur. 



2. Hyacinth-red. Red with yellow and a little brown. 

 Ex. Pyramidal Zircon, called Hyacinth ; dodecahedral 

 Garnet. 



3. Brick-red. Red with yellow, brown, and grey. The 

 colour of newly baked bricks. Ex. Hemi-prismatic and 

 prismatoidal Kouphone-spar ; also Porcelain-jasper, and 

 other varieties of burnt clay. 



4. Scarlet-red. The brightest red colour, but not with- 

 out a tint of yellow. It is the colour of Cinnabar, or 

 of the streak of peritomous Ruby -blende. 



5. Blood-red. Red with a little of yellow and black. The 

 colour of blood. Ex. Dodecahedral Garnet, called Pyrope. 



6. Flesh-red. A pale red colour, with grey and a little 

 vellow. E.v. Prismatic Hal-barvte. 



