This year, 255 dedicated readers participated in the 2002 Gems & Gemology Challenge. Entries arrived from all corners of the world, as readers tested their knowledge on the questions listed in the Spring 2002 issue. Those who earned a score of 75% or better received a GIA Continuing Education Certificate recognizing their achievement. The participants who scored a perfect 100% are listed below. Congratulations!

AUSTRALIA Berala, New South Wales: Barbara Wodecki. Coogee, Western Australia: Helen Judith Haddy. Maleny, Queensland: Erwin Stadelmann. Slacks Creek, Queensland: Ken Hunter • BELGIUM Diegem: Guy Lalous. Diksmuide: Honoré Loeters. Hemiksem: Daniel De Maeght. Overijse: Margrethe Gram-Jensen. Ruiselede: Lucette Nols • BRAZIL Rio de Janeiro: Luiz Angelo. São Paulo: Ana Flavia Pantalena • CANADA Bobcaygeon, Ontario: David R. Lindsay. Calgary, Alberta: Janusz J. Meier, Sharon L. Paige. Etobicoke, Ontario: David N. Carabott. Kingston, Ontario: Brian Randolph Smith. Laval, Québec: Monique Savard. Montreal, Québec: Marie-France Rosiak. St. Catharines, Ontario: Alice J. Christianson. Toronto, Ontario: Ken Miller, David Reuben. Vancouver, British Columbia: Michael Cavanagh, Eva B. Nilsson. Winnipeg, Manitoba: Alyson Raynard • ENGLAND London: Rosemary Ross. Tenterden, Kent: Linda Bateley • FINLAND Oulu: Petri Tuovinen • FRANCE Paris: Marie-France Chateau • GERMANY Nurnberg: Herbig Klaus • INDIA Shimla: Deepak Bagai • INDONESIA Jakarta: Warli Latumena • ITALY Ferrara: Sonia Franzolin. Malnate, Varese: Tralli Gabriele. PortoAzzurro, Livorno: Diego Giuseppe Trainini. Valenza: Rossella Conti. Vicenza: Fabio D'Amico, Francesca Zen • NETHERLANDS Rotterdam: E. van Velzen. Wassenaar: Jane M. Orsak • PARAGUAY Asunción: Viviana Stiegwardt • PORTUGAL Figueira, Algarve: Johanne Jack • SCOTLAND Edinburgh: James Heatlie • SPAIN Playa P. Farnals, Valencia: Monika Bergel Becker. Madrid: Shahrazad Krewi de Urquijo • SWEDEN Järfälla: Thomas Larsson • SWITZERLAND Rodersdorf: Heinz Kniess. Zollikon: Adrian Meister. Zürich: Eva Mettler • THAILAND Bangkok: Zin Win Mon • ZIMBABWE Harare: Lesley Faye Marsh • UNITED STATES Arizona Sun City: Anita R. Wilde. Tucson: Dave Arens, Luella Dykhuis, Molly K. Knox. California Burlingame: Sandra MacKenzie-Graham. Burney: Willard C. Brown. Carlsbad: Michael T. Evans, Elaine Ferrari-Santhon, Brian Genstel, Martin Harmon, Alethea Inns, Mark Johnson, Doug Kennedy, Jan Lombardi, Roxana J. Lucas, Diane Saito, Abba Steinfeld, Jim Viall, Michael Wobby, Philip G. York, Marisa Zachovay. Coronado: Allen P. Salgado. Fremont: Ying Ying Chow. Hercules: Ana Tom. Los Angeles: Veronica Clark-Hudson. Los Gatos: G. Donald Eberlein. Marina Del Rey: Veronika Riedel. MillValley: Susan Bickford. Rancho Cucamonga: Sandy MacLeane. Redwood City: Starla Turner. San Diego: Joseph St. Eliyas. San Jose: Wendy Bilodeau. San Rafael: Robert A. Seltzer. Seal Beach: Barr L. Doty. ColoradoAurora: Ronda Gunnett. Colorado Springs: Barbara J. Maffei. Denver: Mary Shore. ConnecticutNew Haven: Matilde McAfee.Vernon:  Joe Thon. Florida Clearwater: Timothy D. Schuler. Coral Gables: D. Christine Lones. DeLand: Sue Angevine Guess. Lauderdale-by-the-Sea: Pamela J. Rossi. PalmCoast: Donald Haren. SatelliteBeach: Consuelo Schnaderbeck. Sun CityCenter: Jeanne Naish. Sunrise: Timothy J. Swygard. Tampa: Kirsten Becker, R. Fred Ingram. Georgia Woodstock: H. Regenia Staley. Hawaii Hanalei: Nancy Y. Blanton. Honolulu: Brenda Reichel. Makawao: Alison Fahland. Illinois Chicago: Linda Nerad. Danvers: Anne Blumer, William Duff. Elgin: Jerry Long. Mokena: Marianne Vander Zanden. Indiana Fishers: Laura D. Haas. Indianapolis: Mark Ferreira. Kentucky Shepherdsville: Carroll J. Kiefer. Maine South Freeport: Arthur E. Spellissy Jr. Maryland Baltimore: Alissa Leverock. Darnestown: Ron Suddendorf. PatuxentRiver: Pamela D. Stair. MassachusettsBraintree: Alan R. Howarth. Brookline: Martin Haske. Lynnfield: John A. Caruso. Uxbridge: Bernard M. Stachura. Minnesota Paw Paw: Ellen Fillingham. Rochester: Renato V. Rossi. Missouri Perry: Bruce L. Elmer. Mississippi Hattiesburg: A. Thomas Light. North Carolina Advance: Blair Tredwell. Candler: Christian Scott Richart. Creedmoor: Jennifer Jeffreys-Chen. Greensboro: Lorraine D. Dodds. Kernersville: Jean A. Marr. Manteo: Eileen Alexanian. Wilmington: Ben H. Smith Jr. New Jersey Union: Thaïs Anne Lumpp. New Mexico Albuquerque: Mark Daniel West. Nevada Las Vegas: Deborah A. Helbling. Reno: Terence E. Terras. New York New York: Armando Aranjo, Dan Campbell, Fran Greder, Anna Schumate. Ohio Cuyahoga Falls: Catherine S. Lee. Dayton: Michael Williams. Powell: Benjamin T. Stahl. Oregon Hermiston: Thelma Roe. Medford: Barbara A. Johnson. PennsylvaniaJonestown: Edward E. Reichard. SchuylkillHaven: Janet L. Steinmetz. Yardley: Jon Barry DiNola, Peter R. Stadelmeier. South Carolina Sumter: James S. Markides. Tennesee Germantown: Charles L. Rose. TexasCorpus Christi: Warren A. Rees. Flower Mound: Elizabeth M. Roach. Houston: Karen L. Jensen. Katy: Christine Schnaderbeck. San Angelo: Henry R. Chipman. Virginia Kilmarnock: Mary K. Helne. Washington Poulsbo: Ruth Jorgensen. Redmond: Andrea Frabotta. Seattle: Janet S. Holmes, Ahmad Samsavar. Spokane: Jan Jennings. WisconsinBeaver Dam: Thomas G. Wendt. East Troy: William Bailey. Mequon: Kathleen J. Molter