C. Diamond Simulants 1. Caused by growth irregularities such as twinning. Diamond may exhibit blue or orange colors in its pavilion, but in most cases these colors extend only across one or two facets. Specific gravity liquids causes different reflection patterns when diamond simulant is immersed. Best with stones cut as round brilliants.
Measures change in gemstone's surface temperature.
D. General Characteristics of Simulants 1. Possible read-through effect. Monochromatic color flash on pavilion facets. Higher SG than diamond. Characteristic immersion reflection patterns.