Since 1797, when Tennant demonstrated that diamond consists solely of elemental carbon
by comparing the volume of carbon dioxide formed by burning identical weights of charcoal …

This book is an attempt to put together and critically analyze the available data on diamonds
processed by the methods involving high pressure, high temperature annealing—so-called …

ABSTRACT The Russian company New Diamond Technology is producing colorless and
near-colorless HPHT-grown synthetic diamonds for the gem trade. Forty-four faceted …

The presence of boron in the structure of diamond is rare in nature, and even when present,
reported values are≤ 0.5 ppm. This study used various spectroscopic methods and time-of …

Phosphorescence is a basic luminescence phenomenon that is represented by continuous
light emission for a period after materials have absorbed excitation energy. Here, an obvious …

Photoluminescence (PL) spectroscopy is frequently mentioned in the gemological literature,
but its relevance to the wider trade audience is rarely discussed. Due to the possibility of an …

The emergence of phosphorescence in diamonds has aroused great interest in their
photoelectric information applications. Nevertheless, the existing phosphorescence in …

Synthetic diamonds have inspired much interest for their unique photophysical properties
and versatile potential applications, but their phosphorescent phenomenon and mechanism …

The science of gemology has its roots in two main functions: observation and interpreta tion
of those observations. With this approach, gemologists have developed quite effective ways …

In this study, 4× 4 mm 2 freestanding boron-doped diamond single crystals with thickness up
to 260 μm have been fabricated by plasma assisted chemical vapour deposition. The boron …