This is a highly attractive book; the photographs actually almost made me salivate. The majority of emeralds in the marketplace are reprehensible--the ones pictured here prove that emeralds done right are among the most transcendently lovely objects on earth.
Ward clearly knows his emeralds (and other gemstones); he effectively and clearly transmits the basic information important to emerald novices. For example, he's correct to note that most people don't realize their emeralds have been oiled, and he puts to rest any criticisms of oiling--it makes the stone the best it can be be, after all.
I can tell he started out as a journalist. He has a very investigative-journalist, breathless tone. I think it works for the most part, especially when he's rhapsodizing over discoveries of sunken treasure or fabulous royal jewels attached to epic legends and lore.
But he is mildly biased against certain types of stones. He excessively disses the Egyptian mines. I'm glad he delves into the history of Cleopatra's mine, and I even appreciate his attempts to theorize as to the real chemical composition of the alleged "emeralds" from Egypt. However, he sprinkles in derogatory references to the Egyptian mines throughout the entire text, finding them vastly wanting. I think this is overkill. Colombians are the best--we get it.
Also, he frequently disparages ancient South American (Incan, for e.g.) and Egyptian empires' facility with stonework and knowledge of stones. He writes things akin to, "while we would never find such simply drilled, untumbled stones attractive, the ancients knew no better.." Actually, I quite liked the simple, untumbled emeralds he showcased; some of the ancient jewelry was quite stunning, and while it's not to my tastes to wear, I know several schools of people who are into that whole "organic" look.
By the way, this is a very slim volume. It's suitable either for complete novices or for collectors who want anything on their favorite stones.