"Populations in both eastern and western cultures have been mining, trading, and carving garnets for millennia. Named for its likeness to the flesh and seeds of the pomegranate (Latin granatus), garnet is most commonly thought of as a red gemstone, but it actually occurs in all colors of the spectrum. In fact, garnet is a complex group of fifteen separate mineral species, which are sometimes hard to differentiate visually and more often ..."
Geologica Earth's Dynamic Forces (Geological Time, Supercontinents, Climate, Landforms, Animals, Plants) by Dr-Robert-R-Coenraads, JohnI. Koivula, Robert Raymond Coenraads Hardcover, 576 Pages, Published 2007 by Millennium House ISBN-13: 978-1-921209-06-2, ISBN: 1-921209-06-2
"GEOLOGICA is an informative study of the Earth's vast physical features, landscapes, plants, and animals."
MicroWorld of Diamonds(1st Edition) A Visual Reference by JohnI. Koivula Hardcover, 157 Pages, Published 2000 by Gemworld International ISBN-13: 978-0-9641733-5-4, ISBN: 0-9641733-5-2
"Beautiful pictures of inclusions. Truly magnificent."
"Diamond is associated with ideals of purity, love, nobility, and wealth and with curses, corruption, and poverty. Its unique properties are studied by physicists and geologists, while its value, brilliance, and cultural importance make it a target of historians, investors, lovers, and thieves. Simple, iconic, and beautiful, diamond is the ultimate gemstone."
"The book presents an insight into the different types of landscapes; volcanoes, caves, deserts, glaciers and deltas are explored in relation to their geological heritage."
"A magnificent, large-scale reference work, featuring outstanding colour photography of the Earth's natural features along with satellite images and maps, Geologica first describes the planet's formation, geology and the interaction of tectonics and climate over time, then goes on to deal with various types of landforms, from volcanoes to karst and caves, and the animals and plants they support. The complete work is contained on the acco ..."
"All of this is together in a single volume for the first time, making this a must-have for all collectors, dealers, gemologists, appraisers, curators and anyone else with an interest in this fascinating gem."
Geologica The Origins of the Earth : Landscapes, Landforms, Plants, Animals by Robert Raymond Coenraads, JohnI. Koivula Hardcover, 576 Pages, Published 2007 by Viking ISBN-13: 978-0-670-07106-7, ISBN: 0-670-07106-4
"Part 2 of Geologica is an informative study of Earth's extraordinary physical landforms and some of the plants and animals that inhabit them. Geologica presents an in-depth insight into the different types of landforms."
"Illustré par les photographies couleurs de paysages parmi les plus spectaculaires au monde, enrichi de photographies aériennes et d'images satellite, complété de cartes régionales détaillées, Géologica s'impose comme un ouvrage de ..."
""...Everything we have, everything we are, comes from nature from nature." The first volume of the Photoatlas of Inclusions in Gemstones was published almost 20 years ago in 1986. It was presented to the industry as a standalone book designed to be used by gemologists as a visual reference library of inclusion photomicrographs. It was also intended as a companion volume for use with gemological microscopes and as a guide to microscopic ..."