Results 151 to 160 of about 15,039,014 (169)

Color polymorphism and mating trends in a population of the alpine leaf beetle Oreina gloriosa. [PDF]

PLoS One
Roggero A, Alù D, Laini A, Rolando A, Palestrini C.   +4 more
europepmc   +1 more source

Challenges in Ultra-Trace Beryllium Analysis: Utilizing Recent Extraction Techniques in Combination with Spectrometric Detection. [PDF]

Toxics
Nemček L, Hagarová I.
europepmc   +1 more source

Traditional opal mining practice in Ethiopia, challenges and its economic impact on rural households: the case of wollo opal mining. [PDF]

F1000Res
Abate TW, Sisay AZ.
europepmc   +1 more source

The Gemological Characteristics of Chinese Peridot

Gems & Gemology, 1986
C W Fryer
exaly   +2 more sources

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Gemological Characteristics of Jadeite and Its Crust from Hpakant, Burma

Advances in Geoscience, 2023
On the basis of consulting the literature at home and ...
Zhi-Gao Dai
semanticscholar   +1 more source

LATE JURASSIC INTERIOR-JEWELRY QUALITY AMMONITES FROM THE ULYANOVSK REGION: THE MINERAL COMPOSITION AND GEMOLOGICAL CHARACTERISTICS

Domestic geology, 2022
Decorative articles made of ammonites are currently in high demand. The mineral composition and gemological characteristics of interior-jewelry ammonites from the Upper Jurassic of the Ulyanovsk Region have first been studied in detail. The ammonites are
D. Petrochenkov
semanticscholar   +1 more source

A Brief Discussion on the Gemological Characteristics of Sapphire from Four Different Origins

Advances in Geoscience
The study of gemstone inclusions has long been a hot topic in the jewelry field. However, comparative research on inclusions in sapphires, one of the five precious gemstones, is still limited. Previous researchers have used conventional gemological tests
Shu-Heng Du, Wen-Jun Wei, Azad Kashmir
semanticscholar   +1 more source

JEWELRY AND ORNAMENTAL SEPTARIES OF THE REPUBLIC OF KABARDINO-BALKARIA. MINERAL COMPOSITION, GEMOLOGICAL CHARACTERISTICS

Prospect & protection of mineral resources
Септарии — известково-глинистые конкреции с прожилками кальцита — широко используются в качестве ювелирно-поделочного материала. На российском рынке представлены изделия из септарий Республики Кабардино-Балкария, результаты изучения которых впервые ...
Д. А. Петроченков, А. В. Гулынин, Андрей Викторович Иоспа, Н. Н. Кривощёков   +3 more
semanticscholar   +1 more source

Jewelry and ornamental ammonites from the deposits of the Hauterivian stage of the Ulyanovsk Region: Mineral composition, gemological characteristics

, 2020
Significant volumes of products from ammonites of jewelry and ornamental quality of the Ulyanovsk region are entering the Russian and world markets. Ammonites are associated with the Lower Cretaceous Hauterivian deposits and consist mainly of aragonite ...
A. Petrochenkov
semanticscholar   +1 more source

Petrographic and Gemological Characteristics of Nephrite of Shinuray Village, Tagab District, Kapisa Province

Pamir Academic & Research Journal
نفرایت یک نوع مشهور جید با ترکیب منرالی امفیبول (تریمولیت – اکتینولیت) و از جمله سنگ‌های نیمه قیمتی به‌شمار رفته و بیش‌تر جواهرسازی و وسایل تزئینی کاربرد دارد.
Ekramuddin Tamim, Mohammad Riza Husaini
semanticscholar   +1 more source