knowledge & articles a section of Natural GemsBelgium learning center, with scientific articles.
Why can two gemstones of identical size have very different weights? Explore gemstone specific gravity, Archimedes’ principle, hydrostatic weighing, practical measurement errors and the role density plays in professional gemmological identification.
Turquoise held an extraordinary place in Mexica, commonly called Aztec, material culture. From turquoise mosaic masks and double-headed serpents to associations with water, fire, preciousness and divine authority, discover what archaeological evidence reveals—and where modern crystal beliefs begin.
For thousands of years, jade occupied an exceptional place in Chinese culture. From mysterious Liangzhu bi discs and cong placed in elite burials to later associations with virtue and immortality, discover the documented history behind one of the world's most spiritually significant gemstone traditions.
Why did the ancient Greeks associate amethyst with sobriety and wine? Explore the documented history of amethyst in Greece and Rome, its use in engraved gems, its connection with intoxication, and the surprising truth behind the famous Dionysus and Amethyst legend.
Natural, synthetic, treated, imitation and composite gemstones are fundamentally different categories. Learn what each term actually means, how laboratory-grown gems are created, and how gemmologists distinguish them.
Lapis lazuli was far more than a beautiful blue material in Ancient Egypt. Archaeological objects reveal its use in jewellery, divine amulets and funerary contexts. Explore what evidence actually tells us about its symbolism, religious significance and extraordinary journey to Egypt.
Can a laboratory really determine whether a sapphire came from Sri Lanka, Madagascar or Myanmar? Discover how inclusions, spectroscopy, trace-element chemistry and known-origin reference stones are combined—and why some results must remain inconclusive.
Dalmatian Jasper is known for its distinctive black-spotted appearance and modern associations with grounding, joy and spiritual balance. Discover its true geology, symbolic meaning and responsible ways to use Dalmatian Stone in meditation and reflection.
Dream Amethyst, or Chevron Amethyst, combines striking purple and white quartz patterns with a rich spiritual tradition. Explore its mineralogy, symbolism and associations with meditation, intuition, dreams and inner reflection.
Why does tourmaline grow in pegmatites, ruby occur in marble, emerald form through fluid-rock interaction and diamonds come from the mantle? Explore the geological environments and processes that create natural gemstones.
