page_title: Gemology
section_title: Identification by inclusions
hierarchical_section_title: Gemology / General identification of gems / Identification by inclusions
caption_attribution_description: English: The curvature observed in this synthetic color-change Sapphire is due to a process known as the Verneuil Process or, flame fusion. During this process, a fine crushed material is heated at extremely high temperatures. The crushed material is then melted which drips through a furnace onto a boule. This boule where the Corundum cools down and crystallizes, spins and thus causes the curved striations. Natural Corundum does not form this way and helps gemologists separate natural Corundum from synthetic Corundum.
context_page_description: Gemology or gemmology is the science dealing with natural and artificial gemstone materials. It is a geoscience and a branch of mineralogy. Some jewelers are academically trained gemologists and are qualified to identify and evaluate gems.
context_section_description: Inclusions can help gemologists to determine whether or not a gemstone is natural, synthetic or treated (i.e. fracture-filled or heated).
caption: The curvature observed in this synthetic color-change sapphire is due to a process known as the Verneuil Process or, flame fusion. During this process, a fine crushed material is heated at extremely high temperatures. The crushed material is then melted which drips through a furnace onto a boule. This boule where the corundum cools down and crystallizes, spins and thus causes the curved striations. Natural corundum does not form this way and lacks the curved striations.
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