Science & Nature

Mai 1, 2015

Tools for the trade

Buying a diamond is something most people do very rarely, but it's usually a considerable and exciting investment. Every diamond is unique, and there is a variety of factors which affect the price of a diamond. To reveal factors that are most important to you, and to choose a diamond that satisfies your individual standards for beauty and value, gemological tools can be most essential and efficient. 

The first gemological laboratory serving the jewelry trade was established in London in 1925, prompted by the influx of the newly developed "cultured pearl" and advances in the synthesis of rubies and sapphires. There are now numerous gem labs around the world requiring ever more advanced equipment and experience to identify the new challenges - such as treatments to gems, new synthetics and other new materials.

From its humble beginnings, Rubin & Son has established itself as the reference for supplies, tools and instruments needed in the diamond and jewelry industry. The company's philosophy has always remained the same: to cater to its customers' needs by providing them with high quality goods combined with an impeccable after-sale service.

Rubin & Son provides a entire range of supplies and equipment for the diamond dealers, jewelers and gemologists. Rubin & Son's product line spans from daily usable items such as tweezes, loupes and parcel papers to the most sophisticated supplies. This includes jewelry balances, gold and diamond testers, cleaning and measuring equipments, general tools for diamond traders, jewelry cases and window displays.

Here are some of the most often used gemological testing equipment frequently used among professionals: 

Jeweler's Loupe

This is the instrument of choice of the best gemologists. With this you can separate synthetic moissanite or cubic zirconia from natural diamond, clarity grade a diamond, cut grade a diamond...and you don't have to plug it in anywhere. Fits in your pocket. 

The polariscope is a critical piece of equipment for any gemologist's office. It can easily identify single and double refractive gemstones, and in many cases allow you to view the optic interference figure and give you the optic character of the gemstone. Too large and difficult for travel, but on the desk of a properly trained gemologist the polariscope can help make gemstone identification far more accurate and efficient.

The refractometer is used to determine the indexes of refraction of the stone. This instrument calculates speed with which luminous rays arise from the stone and indicates it on a scale.  The gem is placed on a coated pane of a fine particle of liquid made up amongst other things of methylene iodide which shows an index of refraction of 1.81 (this liquid is toxic)

Dichroscope of which the principal part is made up of a tube comprising a window with the one of the ends and a lens with the other, between the two is assembled a piece of calcite, chosen because of its strong double refraction so that two images of the window appear side by side to the observer which looks in the eye-glass.  The light of the adjacent images of the window vibrates in two perpendicular plans one to the other at a rate of one only plan for each image.  The rotation of the stone is a significant factor during the control of dichroism, bus in all the double refraction stones, it exists one or two directions of unirefringence, known as optical axe.

Color Filter (Chelsea Filter)

A Chelsea filter, also referred to as an "emerald filter" or "color filter," is a gemmological dichromatic filter that can help separate some natural gemstones from their synthetic gemstone counterparts. A Chelsea filter absorbs visible light with the exception of long red wavelengths, which are transmitted through the filter causing some minerals to change color.

The color of a gemstone is due to the absorption and transmission of different wavelengths of full-spectrum white light. The "green" of emerald is created from a combination of different wavelengths that can help distinguish a "chromium" colored natural emerald from other types of green gemstones, or emerald imitations/simulants that are colored by elements other than chromium. 

Mais artigos

DestaquesArtigos

  • tv2016-10-03-15-33-28hifile1400-1

    Technology

    Mar 1, 2017

    TELEVISÕES TRANSPARENTES - ESCONDIDAS À VISTA

    Assim mesmo! O novo conceito de ter uma televisão mesmo no meio da sala sem que seja vista chegou e até é muito superior ao que seria de esperar. Mais transparência, melhor definição de imagem, muito mais qualidade.

  • levizen-water-levitation-4

    Home & Design

    Jul 7, 2018

    ÚTIL E INVULGARMENTE BONITO

    O LeviZen é uma peça de design com um 'look retro' e usa ondas de som com frequências altas para levitar água e luz. É financiado através da plataforma Kickstarter e já ultrapassou o valor de investimento inicial, partindo...

  • dynamiq-gtt-115-porsche-inspired-yacht-1

    Mecanica e Locomoção

    Jul 1, 2017

    ULTRA LUXUOSO

    Tem design da Porsche, mas não se destina às estradas. Tem o conhecimento dos holandeses, mas não serve para cultivar tulipas. Está a ser construído em Itália, mas é uma criação monegasca. Confuso? Em vez disso, deslumbre-se.

    ...


  • 91mRraW8AAL._SL1500_

    Helthcare & Wellness

    Abr 1, 2017

    ALÍVIO DAS ALERGIAS

    Abril significa Primavera, tempo bom, belos passeios pela praia ou pelo campo, flores e alergias. Para os que sofrem deste problema todos os anos, Primavera significa nariz congestionado, espirros, olhos vermelhos e até febres.

    ...

  • 4wr3BQJ

    Home & Design

    Abr 1, 2017

    YOSEGI-ZAIKU - A ARTE YOSEGI

    Descobrimos a arte Yosegi, linda e curiosa, esta técnica japonesa de "parquet" consiste em dispor a madeira no chão, formando padrões. Para o conseguir, colam-se pedaços de madeira de diferentes cores num bloco compacto, que é depois...

  • AdobeStock_70053652

    Food & Beverage

    Abr 1, 2017

    PEQUENO ALMOÇO - COMEÇAR O DIA A COMER

    Os benefícios do pequeno-almoço para a saúde, não têm sido consensuais ao longo da história e, ainda hoje se discute que tipo de alimentos se devem ingerir de manhã e se estes devem ou não estar dependentes da actividade física...


  • Bianchi-Specialissima-1

    Sport

    Mai 1, 2016

    BAIXO PESO, ALTA PERFORMANCE

    Com acesso facilitado a fibras de carbono, a indústria das bicicletas de alto desempenho pode agora recorrer a novas tecnologias a preços mais competitivos, devido ao conhecimento desenvolvido pelas várias equipas de Fórmula 1...

  • Production Line

    Luxury & Fashion

    Dez 1, 2014

    Always look your best

    BIELITA and VITEX are two Belarussian partner companies that work for a common goal. This biggest Belarussian cosmetics producer is an example of a successful business operating for over 20 years at Belarussian and global market.

  • facas2

    Business & Industry

    Ago 1, 2016

    Portuguese Cutting Edge

    The pleasure we gain while in the process of cooking depends not only on the quality of products, but on the knives used for cutting, too. Everyone fond of cooking is sure to have a set of good kitchen knives in his/her kitchen.

    ...