Liddicoat also participated in writing three important books for gemologists. IGI has a staff of over 650 gemologists, appraisers and professional office personnel. The Society trains and certifies jewelers, gemologists, and jewelry appraisers. It was a popular pastime for amateurs and gemologists alike. Her parents being amateur gemologists, named her after azurite, a semi-precious mineral. Of the two, calcite gives better results and is widely used by experienced gemologists. Some gemologists consider the mere presence of oil or polymers to constitute enhancement. Gemologists use it as an aid in the identification of gemstones. Gemologists study these factors while valuing or appraising cut and polished gemstones.