Fused silica glass, especially the lower -OH types, can exhibit fluorescence when illuminated with 254nm light with a Schott UG-5 glass filter. From Heraeus Amersil data, this apparently does not occur in the high -OH materials in the Suprasil^® family. Slight blue to blue-violet appears in materials such as Homosil^®, Herasil^®, Infrasil^® and HOQ 310. Quartz glass is free from visible fluorescence at excitation wavelength greater than 290nm.

Some varieties of sapphire have been reported to exhibit fluorescence under UV excitation. Cladding and buffer materials used in the manufacturing of optical fiber may exhibit similar emission characteristics under some types of excitation, UV, soft X-ray or energetic particles. Polymicro offers a variety of fiber types that use low fluorescence silica.

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