Sept. r, 1894] 
THE TROPICAL 
AGRICULTURIST. 
'57 
CEYLON MANUAL OF CHEMI- 
CAL ANALYSES. 
A HANDBOOK OF ANALYSES CONNECTED WITH 
THE INDUSTRIES AND PUBLIC HEALTH OF 
CEVLON FOR PLANTERS, COMMERCIAL MEN, 
AGRICULTURAL STUDENTS, AND MEMBERS OF 
LOCAL BOARDS. 
By M. COCHRAN 1 , m.a., f.c.s., 
(Continued from page 81.) 
CHAPTER XV. 
PRECIOUS STONES AND GEMS. 
List of precious stones shewing those found 
in ceylon — hardness, specific gravity and 
chemical composition of some ceylon pre- 
cious stones and gems chrysoberyl 
corundum — quartz— garnet— beryl— spinel 
iolite tourmaline zircon orthoclose 
felspar — pearl— coral. 
The following list of precious stones and 
gems is, with a few additions and alterations 
taken from the work entitled Precious Stones by 
A. H. Church, m.a., f.c.s., f.i.c, Professor of 
Chemistry in the Royal Academy of Arts. 
I have indicated by an asterisk those of them 
that are found in Ceylon. 
(I am i'ldebted to Mr. Geo. Armitage of 
Colombo for assistance in marking oil' the Cey- 
lon stones.) 
Common Name. 
* Achroite ... 
* Agate 
* Alexandrite 
* Almaudiue 
Amazon-stone 
Amber 
* Amethyst ... 
* Amethyst (Oriental) 
Anatase ... 
* Aquamarine 
Avanturine 
Avanturine Felspar 
Axinite 
Azure-stone 
* Balas Ruby 
* Beryl 
Bloodstone 
Boart 
Rronzite ... 
Cacholong... 
* Cairngorm... 
* Carbuncle ... 
* Cat's- Eye ... 
* Cat's- Eye ... 
Cat's- Eye ... 
* Chrysoberyl 
Chrysolite... 
* Chrysolite (Oriental) 
Chrysoprase 
Cinnamon-stone 
Coral 
Camel ian ... 
Corundum... 
Crocidolite 
( \ mophane 
Delessite ... 
Diamond ... 
Dichroite .. 
Diopside ... 
Egyptian Jasper 
Emerald 
Epidote 
20 
Mineralogical Name. 
Tourmaline 
Quartz 
Crysoberyl 
Garnet 
Microcline 
Succinite 
Quartz 
Corundum 
Anatase 
Beryl 
Quartz 
Oligoclase 
Axinite 
Haiiyne 
Spinel 
Beryl 
Quartz 
Diamond 
Bronzite 
Opal 
Quartz 
Garnet 
Chrysoberyl 
Quartz 
Crocidolite 
Chrysoberyl 
Chrysolite 
( 'hrysoberyl 
Quartz 
Garnet 
Calcite 
Quartz 
Corundum 
Crocidolite 
Chrysoberyl 
Delessite 
Diamond 
Dichroite 
Pyroxene 
Quartz 
Reryl 
Epidote 
Common Name. 
* Essonite ... 
Euclase 
* Felspar 
Felspar 
Felspar 
Fish-eye-stone 
Flint 
Fossil Turquoise 
* Garnet 
■ Haematite... 
Heliotrope 
Hiddenite ... 
" Hyacinth ... 
Hyalite 
Hydrophane 
' Hypersthene 
Indieolite ... 
; lolite 
r Jacinth 
: Jargoon 
' Jasjier 
Labrador Spar 
Lapis-lazuli 
I.umachella 
Malachite ... 
Marcasite ... 
.Mocha-stone 
' Moonstone 
Moss Agate 
Nephrite ... 
Nephrite ... 
' Obsidian ... 
Oligoclase ... 
Onyx 
Opal (precious) 
( Ip.al (common) 
Orthoclase 
Pearl 
Peridot ... 
Plasma 
Phenakite . . . 
Pleonaste ... 
Porcelain Jasper 
Prase 
Pyrites 
Pyrope 
Quartz 
Riband Jasper 
Rock Crystal 
Rose Opal ... 
Rose Quartz 
Rubellite ... 
Ruby 
Sapphire ... 
Sapphirine Quartz 
Sard 
Sardonyx ... 
Smoky Quartz 
Sphene 
Spinel 
Spodumene 
Sunstone ... 
Topaz 
Topaz (Oriental) 
Tourmaline 
Turquoise 
Zircon 
Mineralogical Name. 
Garnet 
Euclase 
Orthoclase 
Labradorite 
Microcline 
Apophyllite 
Quartz 
Odontolite 
Garnet 
Haematite 
Quartz 
Sjiodumene 
Zircon 
Opal 
Opal 
Hypersthene 
Tourmaline 
Dichroite 
Zircon 
Zircon 
Quartz 
Labradorite 
Haiiyne 
Calcite 
Malachite 
Marcasite 
Quartz 
Orthoclase 
Quartz 
lade 
Iadeite 
Obsidian 
Oligoclase 
Quartz 
Opal 
Opal 
Orthoclase 
Calcite 
Chiysolite 
Quartz 
Phenakite 
Spinel 
Quartz 
Quartz 
Pyrites 
Garnet 
Quartz 
Quartz 
Quartz 
Opal 
Quartz 
Tourmaline 
Corundum 
Corundum 
Quartz 
Quartz 
Quartz 
Quartz 
Titanite 
Spinel 
Spodumene 
Oligoclase 
Topaz 
Corundum 
Tourmaline 
Calaite 
Zircon 
Hardness Specific Gravity and Chemical Com- 
position of some Ceylon Precious 
Stones and Gems. 
(For the following facts the work of Pro- 
fessor Church on Precious Stones has mainly 
been laid under contribution. The work of L. 
Strceter on the same subject haa also been 
consulted.) 
