Recently I had the privilege to attend Converge—a unique event uniting GIA’s research and education with our sister organization the American Gem Society’s professional development opportunities—and ...

ABSTRACT: Dissolution of the (100) face of octacalcium phosphate (OCP) single crystal in weak acidic solutions (pH = 6.5; 25°C) was observed in situ using atomic force microscopy. Monomolecular steps ...

IN his attempt to establish as Eocene the age of the salt of the Salt Range of the Punjab, Prof. B. Sahni 1 has succumbed to the temptation of generalizing too far from a particular instance. In 1925 ...

Prodigious siblings can be annoying. All too often, they steal the spotlight and cast behind them an infuriating shadow of achievement and high expectation. The same is true in mineralogy, where some ...

A schematic highlights the trellis or basket-weave pattern composed of tiny crystals of the iron-oxide mineral hematite that is diagnostic of the hematite pseudomorph, martite. The image at left is a ...

These are my oxides. Oxides have the widest range of properties of all the mineral classes. For tellurite, see spiroffite on my sulfates page; mackayite is also there. Gahnite and zincite are on my ...

Abstract: A 23–28 GHz high efficiency broadband monolithic microwave integrated circuit (MMIC) power amplifier (PA) based on a 0.15-µm gallium arsenide (GaAs) pseudomorphic highelectron-mobility ...

Kaolinite is the main clay mineral in most soils around the world and has been widely used for industrial purposes. This research aimed to study chemical, morphological and crystallographic ...

At the Pueblo Gem & Mineral Show, Graeme Dowton of Red Earth Opal (White Cliffs, Australia) exhibited rare double pseudomorph ikaite-calcite-opal gem specimens mined from the Naatji Nest mine at White ...

Houseki no kuni, called Land of the Lustrous in English, is a manga series written and drawn by Haruko Ichikawa, published by Kōdanshasince 2012. Its anime adaptation was directed and written by ...

Plutonic rocks such as gabbros provide information on magmatic and tectonic processes which occur beneath a mid-ocean rift axis as well as on the formation of the oceanic crust. Igneous rocks, ...

An illustration of a magnifying glass. An illustration of a magnifying glass.