Alden Identification Service specializes in scientific, microscopic identification of wood and charcoal, serving clients since 1986. The company provides empirical, evidence-based analyses rather than comparative judgments, with a focus on accuracy, integrity, and clear professional reporting. Its services support appraisers, conservators, restorers, private collectors, and specialists in archaeology, ethnobotany, anthropology, forest products, materials science, and forensic trace evidence.

Wood samples are prepared as thin sections and examined under a compound microscope; charcoal is assessed using fractured surfaces. The analysis records cellular structures and dimensions, with chemical and fluorescence tests used for some tropical hardwoods. Findings are evaluated against wood-anatomy databases, scientific reference samples, and the service’s own collection. Clients receive a professionally written report by email, typically within one to two weeks after samples and payment are received. Rush service may provide results within a day or two.

Co-owner Dr. Harry A. Alden brings expertise in wood anatomy and identification, supported by academic training, published technical references, and experience at institutions including the USDA Forest Products Laboratory, Winterthur Museum, and the Smithsonian Institution.