browner hue and often shows a bluish or greenish fluorescence. The amber from Upper Burma may perhaps be a different resin but it presents, in many specimens at least, very much of the same range of yellow hues as Baltic amber. But burmite, as it has been called, occurs sometimes having a purplish brown colour: in the Indian Museum at South Kensington there is a specimen of this kind nearly a foot in length, from King Theebaw's Palace at Mandalay. It is carved into the form of a duck. Beads and other objects of amber are frequently found in early burial places in Europe. Usually the surfaces have become somewhat darker in colour, less translucent, and somewhat friable: in some instances, however, the material has resisted oxidation in a remarkable manner, witness the amber objects from some of the primitive graves at Abydos and the beautiful amber cup in the Brighton Museum.
Although imitations of amber in yellow glass may be easily detected by means of their coldness to the touch and by their greater density, it is more difficult to distinguish copal resin from amber; still the odour of the latter when rubbed vigorously affords one means of identification.
Jet.
Jet can hardly be regarded in any sense as a precious stone although it has been used from early times for beads, pins, armlets, and other objects of personal adornment. Many examples in perfect preservation have been found in Celtic and Romano-British graves. Jet is a dense, homogeneous, perfectly black variety of coal, having a hardness approaching 4° and a smooth conchoidal fracture. It is still worked to some extent at Whitby on the Yorkshire coast.
Malachite.
Malachite is never used in the higher class of jewellery; its softness, opacity, and crude hue are not in its favour. In Russia