YOUR SOURCE FOR COLOR

Spinel is a naturally occurring gemstone belonging to the cubic crystal system, meaning its atoms are arranged in a highly symmetrical structure that often forms octahedral crystals shapes that look like two pyramids joined at their bases. Chemically, gem-quality spinel is mainly magnesium aluminate (MgAl₂O₄), and it is singly refractive (isotropic), so light travels through it uniformly in all directions. Unlike some gemstones that are limited to one color, spinel occurs in a wide spectrum of hues including red, pink, orange, purple, blue, and violet, with trace elements like chromium, iron, and cobalt influencing its colors: chromium tends to produce red and pink tones, while cobalt can yield intense blues. Spinel’s moderate hardness (8 on the Mohs scale) and good toughness make it durable for use in jewelry, able to handle everyday wear.

In gemological evaluation, color intensity and purity are key factors in assessing spinel’s value, with pure to slightly purplish red tones often being among the most sought after, though vivid pinks and blues are also prized by collectors. Larger fine-color spinels are especially rare above around five carats. Because spinel has historically been mistaken for other gemstones like ruby, modern gemologists use careful observation and instruments to distinguish natural spinel from synthetics or look-alikes, and reputable buyers often seek laboratory reports for assurance of origin and treatment status. Spinel also has a rich historical presence some famous “rubies” in European royal jewels were later identified as spinel, highlighting its enduring allure and importance in gemology.