Did you know most gem species can be distinguished without the element of color? Learn the role gemstone colors play in gem identification.
Learn which rough gemstones are ideal for beginning faceting practice. A progression of relatively inexpensive gem species can teach important skills.
Many varieties of gems besides diamond can be created in the laboratory. Our synthetic gemstone guide covers many examples and explains their manufacture.
Learn how gems absorb wavelengths of light and how gemologists use gemstone absorption spectra to identify gems. There’s more to color than meets the eye!