Book Review: Points of Judging Jade

This little booklet (16 pages) by Peter Goodwin (Fellow, Gemmological Association of Great Britain), published by The South China Morning Post in Hong Kong, is more a collectible than a reference work due to its age and brevity.
The booklet, subtitled "A guide to prospective purchasers," is undated but appears to have been printed in the 1950s.
Goodwin makes shopping for quality jade appear to be somewhat child's play. He offers a few clues to identification as though they constitute a reliable guide, and perhaps in his day that was true.
It is easy to suspect that he wrote to entice rather than warn off the prospective purchaser, given that the booklet was no doubt a hand-out provided to visitors who might trade with the newspaper's advertisers. However, he does warn the tourist and traveller that fakes are likely to abound in smaller shops catering to those passing through.
As noted, the booklet provides only a brief overview. For example, in answer to "Is it jade?," Goodwin advises that real jade has 1) good green color (sometimes mottled); 2) a slightly greasy look; 3) a slightly uneven surface. Substitutes, he notes, are likely glass or plastic, or chalcedony. (Today, quite a few more are recognized).
As an addition to the library of the collector or researcher, the booklet can be found priced in the $10 - $15 range -- at least that was my experience. As a guide for the prospective buyer it will not have much value in a day when the Internet abounds with all sorts of advice, some of it of value.