Tourmaline group minerals have graced the cabinets of mineral collectors and museums for
untold generations. Their colors and color patterns, along with their diverse shapes and …

Tourmaline sensu lato has been known for at least two thousand years, and its unique
combination of physical properties has ensured its importance to human society, from …

Tourmalines form the most important boron rock-forming minerals on Earth. They belong to
the cyclosilicates with a structure that may be regarded as a three-dimensional framework of …

A nomenclature for tourmaline-supergroup minerals is based on chemical systematics using
the generalized tourmaline structural formula: XY3Z6 (T6O18)(BO3) 3V3W, where the most …

With their multitude of colors, gem tourmalines are among the most popular colored
gemstones. Spectacular color-zoned tourmalines are valued as gems and crystal …

Tourmaline-supergroup minerals are ubiquitous accessory minerals in rocks of the Earth's
crust. They can adjust their composition to suit a wide variety of environments, and therefore …

Tourmaline is an eye-catching mineral, but even more importantly, it has played a significant
role in the evolution of scientific thought and, more recently, has been recognized as a …

Tourmaline studies have expanded in breadth and greatly increased in number since 1977,
when micro-analytical and crystallographic/spectroscopic instrumentation became widely …

Statistical analysis of 136 natural tourmaline compositions from the literature reveals the
presence and extent of coupled substitutions involving several cations and structural sites. In …

The results of chemical analyses of tourmaline are usually incomplete owing to difficulties in
dealing with the light elements, valence states of transition metals, and problems with the …