Examine the gemstone report. If the pink sapphire is genuine, it will come with a gemstone report that specifies the stone's provenance and any treatments that have been performed on it. Examine the watermarks for verification of the report's legitimacy. Pink sapphires can be heated to enhance their natural hue. They may also be treated with chemicals to change their color. These processes leave chemical traces in the stone that can be verified by looking up the manufacturer's number on the certificate of authenticity. Heated stones are usually labeled "Haute Pink" or "Hotspur". Hot-worked gems may have additional labels like "Scintillator", "Luminescent", or "Electroluminescent". Genuine unheated pink sapphires do not require a label since they are naturally colored. However, some manufacturers may choose to label them just to assure buyers of their quality. Chemically treated stones are often labeled with the name of the process along with the name of a company or individual who handled those treatments. For example, "Carnelian (Gemex USA)". "Ormand (Gemex USA)" etc. Genuine unpolished pink sapphires may sometimes be sold without a label because they are presumed to be natural colors that haven't been altered in any way.