One substance enclosed by another, e.g. an insect in amber. Related Articles: Rose and blue quartzAlong the Chain of Craters Road, Big Island, Hawaii (Part 4)Book review: The Geology of London (Geologists’ Association Guide No 68), compiled by Diana ClemensJathika Namal Uyana: Sri Lanka’s rose quartz mountain rangeBook review: The Chalk of the South Downs of Sussex and Hampshire and the North Downs of Kent (Geologists’ Association Guide No 74) (vols 1 and 2), by Rory N Mortimore« Back to Glossary Index