Results 101 to 110 of about 941 (201)

A PREMISSA DE SUSTENTABILIDADE DOS DIAMANTES SINTÉTICOS: THE SUSTAINABILITY'S PREMISE OF SYNTHETIC DIAMONDS [PDF]

open access: yes
Diamond is an essential mineral in contemporary society, whether for its practical use in industry or symbolic use in jewellery. Within that, there is a constant demand, partially supplied by synthetic diamonds.
da Cunha Duarte, Lauren   +2 more
core   +2 more sources

Minimizing Visual Defects through Augmentation of Computer Aided Diamond Rough Planning

open access: yes, 2020
Many computer aided design systems today utilize a workflow where physically accurate rendering of the product is not a functional component of its design process.
Prabhu, Abhijith
core   +1 more source

Yeşil opalin gemolojik özellikleri = Gemological characteristics of green opal [PDF]

open access: yes, 2016
Tez (Yüksek Lisans) -- İstanbul Ticaret Üniversitesi -- Kaynakça var.
openaire  

Gemological characteristics and the quality of sapphire from Krong H’Nang - Dak Lak

open access: yesScience and Technology Development Journal - Natural Sciences, 2018
Sapphires in Krong H'Nang area have been found mainly in deluvialor alluvial placers which related to Pliocene-lower Pleistocene basaltoid formations (βN2-Q1). Their main colors are dark green, yellow-green, yellow more rarely dark blue, yellow-blue-green.
openaire   +2 more sources

Gemological Characteristics and Coloration Mechanism of Vanadium-Bearing Beryl from Nigeria

open access: yesMinerals
Vanadium-bearing beryl is a vanadium-bearing variety of green beryl (distinct from emerald) that exhibits an “electro-optical” green (blue-green) color, which has led to its commercial popularity. However, the underlying coloration mechanism remains unclear.
Yunlong Hong   +4 more
openaire   +1 more source

STUDY ON FINANCIAL SUPPORT EFFICIENCY FOR COLLABORATIVE INNOVATION BY LAB-GROWN DIAMOND INDUSTRY CLUSTERS IN CHINA [PDF]

open access: yes
The use of jewelry and jade and the jade culture has a history of thousands of years in China. They were regarded as exclusive luxuries only available to nobles in ancient times.
Fang, Haijiang
core   +1 more source

Radiohalos and Diamonds: Are Diamonds Really for Ever? [PDF]

open access: yes, 2020
Radiohalos were first reported in diamonds more than a decade ago. Since that time little work has been done to locate other radiohalo-bearing diamonds, to explain the origin of the radiohalos, or evaluate their significance.
Armitage, Mark H., Snelling, Andrew A.
core   +1 more source

Inclusions, Chemical Composition, and Spectral Characteristics of Pinkish-Purple to Purple Spinels from Mogok, Myanmar

open access: yesCrystals
With the increasing market demand for spinels of various colors, purple spinel—long regarded as a symbol of nobility—has attracted growing attention. In this study, pinkish-purple to purple spinels from the Mogok region of Myanmar were systematically ...
Danyu Guo   +4 more
doaj   +1 more source

Disordered dolomite as an unusual biomineralization product found in the center of a natural Cassis pearl. [PDF]

open access: yesPLoS One, 2023
Zhou C   +6 more
europepmc   +1 more source

Gemological characteristics and origin of basalt-related sapphire in Dong Nai province

open access: yesScience and Technology Development Journal - Natural Sciences
Basalt – related sapphire in Thong Nhat District, Dong Nai Province, Vietnam, are found in alkaline basalts and their lateritic weathering layers. This study employs standard gemological methods and advanced analytical techniques such as XRD, EDX, Raman spectroscopy, and FTIR to characterize their gemological properties, crystal chemistry, and ...
Le Ngoc Nang   +4 more
openaire   +1 more source

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