Apart from the localities already mentioned, small quantities of amber are also found in Siam, Japan, Rumania, U.S.S.R., Mexico, California, and Greenland. The total annual world production is about 250,000 lbs., of which some 220,000 lbs. come from the Baltic coast. According to records, the largest single piece of amber found was unearthed in East Prussia in i860. Of fine color, it weighed over 21 lbs. and was valued at $4,200 ‘£1,500). It was deposited in the Natural History Museum in Berlin where other diamond jewelry can be found. . It is rare that pieces over one pound in weight are found. It may be mentioned that the Burmese amber is mined and worked almost exclusively by Chinese, and when exported through China, it is marketed as Chinese amber. Its natural color is a dark, reddish-brown, and it is found in mass form. The output is not large; in 1928, the actual output was only about 29 cwts., valued at 12,000 rupees. Much of this amber is carved by the Chinese into small ornaments, which realize a good price.

But much of the so-called Chinese amber is a stained product emanating from Germany, and it is often nothing more than compressed amber or a plastic material.
Sicilian amber, already mentioned, is comparatively rare and generally of fine quality. It is sometimes called Simetite. Rumanian amber is also known as Rumanite. The pale green Sicilian amber is sometimes imitated in Konigsberg and Danzig by injecting green coloring matter into Baltic amber. Such specimens may be distinguished by green splotches in clear amber, the cloudy amber being usually a uniform pea-green in color, much resembling some jades.
In addition to artificial materials which simulate amber, there are other natural resins which closely resemble it. Of these, copal is the best known. Copal is actually a generic name which includes many resins, and these possess a variety of properties which are of little interest to the gemologist. Their use is confined chiefly to the varnish trade, in which they normally realize a price of about $70 (£25) per cwt. Copal is really a semi-fossilized gum. In Zanzibar, it may be found in many areas and in considerable quantities at a depth of three to four feet. Its melting point is 1000 C, while its specific gravity is 1.04 to 1.07. It is not attacked by caustic soda or by acids.
Other copals obtained from living trees are found in West Africa, Brazil, Madagascar, Demerara (British Guiana), and New Zealand. Much has been brought from West Africa, and some sold as amber. Copal takes a poor polish, which it does not retain, and it is quickly affected by heat. Polishing produces friction, which soon results in a sticky surface. It is also readily softened by cold ether, amber being unaffected.