Basic concepts and how to interpret material properties
Discover the fascinating phenomenon of mineral polymorphs, where identical chemical compositions create vastly different gemstones. Learn how pressure and temperature shape the crystals we prize.
An authoritative overview of minerals and gemstones containing radioactive elements. Learn how to identify these materials and implement essential safety protocols for responsible collecting.
Discover the geological process of brecciation and how it creates the striking, fragmented appearance in gemstones. Learn how these unique textures influence structural integrity and market value.
An authoritative exploration of carbonate minerals in gemology, focusing on the chemical structure and properties of the (CO3)2- group. Learn how these minerals form and their implications for gemstone durability and identification.
An authoritative exploration of the orthorhombic crystal system, focusing on the geometric distinctions between tabular and prismatic habits. Learn how these structural properties influence the identification and cutting of precious gemstones.
The Mohs scale is a fundamental tool for determining the scratch resistance of gemstones. Understanding this scale is essential for choosing the right stones for daily wear and implementing proper maintenance routines to prevent permanent damage.
Explore the scientific phenomenon of gemstone cleavage and how it differs from fracture. Learn how internal atomic structures influence a gem’s vulnerability to impact and how to choose settings that protect fragile stones.
Explore the fascinating optical phenomenon of asterism in black diopside. Learn how microscopic inclusions create the ‘star’ effect and what distinguishes this rare variety from other star gemstones.
Explore the deep-earth origins of some of the world’s rarest gemstones. This guide examines how ultramafic rocks, rich in magnesium and iron, serve as the primary host for extraordinary minerals like peridot and tsavorite.
Understanding the distinction between adamantine and vitreous luster is fundamental to gemstone identification. This guide explores the physics of light reflection and provides practical methods for distinguishing these two primary luster types.
