Results 111 to 120 of about 941 (201)
Research gemology and mineralogy characteristics of Tektite in North region of Da Lat City
Science and Technology Development Journal, 2017 Tektite in northern of Da Lat city is a kind of natural glass, formed from meteorite collisions with Earth, have basic elements Si, Al, Fe, Mg. Typical shapes inclued debris, drops, oval, dumbbell, flat sphere, flat mace, short prism with external shape characterized by holes covering the surface.
Man Nguyen Tri Ho +2 more
openaire +2 more sources
CrystalsMaw-sit-sit jade resembles kosmochlor-jadeitite in appearance and is spatially associated with it in the Myanmar Jade Belt. However, the mineral composition, microstructure, and petrogenesis of this type of jade remain unclear.
Yu Zhang, Guanghai Shi, Jiabao Wen
doaj +1 more source
Global Symposium on Gender and Fisheries : Seventh Asian Fisheries Forum, 1-2 December 2004, Penang, Malaysia [PDF]
The 18 papers contained in this volume represent a substantive contribution to the literature on the topic of gender and fisheries. Drawing on work undertaken around the globe, the results described here confirm and extend earlier work and show that ...
Choo, Poh-Sze (ed.) +3 more
core
Water characterization and structural attribution of different colored opals. [PDF]
RSC Adv, 2022 Li N, Guo Q, Wang Q, Liao L.
europepmc +1 more source
Gemological and Chemical Characterization of Gem-Quality Titanite from Morocco
CrystalsTitanite is a widespread accessory mineral in igneous, metamorphic, and hydrothermal rocks, but few comply with gem-grade requirements. Previous studies on Moroccan titanite focused on elementary composition and U-Pb dating.
Yu Yuan +5 more
doaj +1 more source
Прайс-листи на вироби з бурштину як інструмент експертного оцінювання: гемолого-правові засади [PDF]
The purpose of this research paper is to develop an algorithm for compiling price lists for amber products based on real market data for necklaces and beads.
Baranov, Petro +2 more
core +1 more source
CrystalsA new type of vesuvianite jade has recently been discovered in Hanzhong City, Shaanxi Province, China. However, a systematic investigation into its mineralogical characteristics and the origin of its color is currently lacking.
Ye Yuan +4 more
doaj +1 more source
Colorimetry characteristics and color contribution of fluorescence in natural Cr-containing spinel. [PDF]
Sci Rep, 2023 Tang J, Guo Y, Zhang J.
europepmc +1 more source
Izvor smaragdov v arheoloških predmetih na Slovenskem [PDF]
, 2016 Dolenec, Matej +5 more
core +1 more source
Spectroscopy and chromaticity characterization of yellow to light-blue iron-containing beryl. [PDF]
Sci Rep, 2022 Shang Y, Guo Y, Tang J.
europepmc +1 more source