A dichroscope separates polarized colour components hidden inside anisotropic gemstones. Learn how to observe dichroism and trichroism in sapphire, ruby, tourmaline, iolite and tanzanite—and how pleochroism supports gemstone identification.
Learn how a gemstone polariscope uses crossed polarized light to distinguish singly refractive, doubly refractive and aggregate materials, detect strain and reveal uniaxial and biaxial optic figures
A gemstone refractometer converts gemstone optics into measurable evidence. Learn how to take accurate refractive-index readings, recognise single and double refraction, calculate birefringence, use spot readings and understand when RI alone is not enough
A gemmological microscope reveals far more than magnification alone. Learn how darkfield, brightfield, fibre-optic, reflected and polarized illumination expose inclusions, colour zoning, treatments, surface features and growth structures.
A 10× loupe is one of gemmology’s simplest and most useful instruments—but only when used correctly. Learn how to use a 10x loupe with professional focusing technique, lighting, systematic gemstone inspection, what inclusions can reveal, and when magnification alone is not enough
