Fascinating colors of diamonds are generated by a combination of mechanisms including Fresnel reflection, volume absorption and light dispersion. This paper proposes an approach to unify these mechanisms to synthesize realistic computer images of diamonds. Our work is based on a composite spectral model that accounts separately for smooth components and spikes in spectra. While sufficiently han...

For the work results correct interpretation, it is important to study initial materials that scientists have deal with. Currently, there are a large number of different diamond substrates. Comparison among themselves allows you determine which material dealing In this work, methods infrared (IR) spectrometry, Raman spectroscopy and spectrophotometry used four types materials: polycrystalline CV...

Major element studies of fluid inclusions in fibrous and cloudy diamonds reveal that most inclusions trapped high density fluids (HDFs) with a wide range of composition. The compositions fall along two arrays between three end-members: carbonatitic to hydroussilicic and carbonatitic to hydrous-saline. Recent studies of diamonds from Siberia and Kankan (Navon et al., 2008; Weiss et al., 2008) fu...

SYLVIE CORTEEL AND CARLA D. SAVAGE Abstra t. In this note we generalize the plane partition diamonds of Andrews, Paule, and Riese to plane partition polygons and plane tree diamonds and show how to ompute their generating fun tions. 1. Introdu tion In [1℄, Andrews, Paule, and Riese introdu e the family of plane partition diamonds. A plane partition diamond of length n is a sequen e of length 3n...

Mineral inclusions encapsulated in diamonds are the oldest, deepest, and most pristine samples of Earth's mantle. They provide age and chemical information over a period of 3.5 billion years--a span that includes continental crustal growth, atmospheric evolution, and the initiation of plate tectonics. We compiled isotopic and bulk chemical data of silicate and sulfide inclusions and found that ...

A microwave plasma chemical vapour deposition (MPCVD) system has been used to deposit nanometre-sized single-crystalline diamonds on 1 × 1 cm(2) Si(100) substrates. The distribution of deposited diamonds has good uniformity over the whole Si substrate surface by using a dome-shaped Mo anode which allows the application of bias-enhanced nucleation. The morphology and crystallinity of the deposit...

a working document by global witness. 10 may 2000 This working report has been produced by Global Witness. Partial funding for this report was kindly received from the UN department of the UK Foreign and Commenwealth Office (FCO), without which this report would not have been possible. The views expressed within are solely those of Global Witness. There are many individuals, companies and count...