TOOLS


Gemmological Instruments


Diffraction Spectroscope


Info: Tis unit comes it to coloured lters, red and blue for different effects and to olding plates in a ooden base, one plate is to vie te top of te stone table and te oter is to vie te culet te pointed bottom)


nly if te stone as te desirable brilliant cut can te earts and arros be seen, demonstrating to you and your customer te uality of te cut


or pure transparent non opaue) stones ac type of stone as its on spectrum colour diagnostic imular to te prism spectroscope but ors by diffracting ite ligt to give non prismatic perspective


igt enters troug a narro slit and is ten diffracted by a tin lm of diffraction grating material Tis produces a linear spectrum image it a generally larger vie of te red part tan a prism spectroscope


Te spectroscope is a small and andy instrument tat can be very uic to use It may be used to test transparent gem materials including roug and broen pieces, fasioned pieces, strings of beads, gems set in eellery, ornaments and carvings Te spectrum of visible ligt, from red to violet can be vieed by observing pure ite ligt troug a spectroscope ome gem materials modify tis ite ligt in a ay ic can aid identication  ie lengt mm  iameter of body 13mm  iameter of lens mm  inis stainless steel body  Top & bottom blac plastic vieers  Weigt 14grms  Wit leater case


Code E9518 Description Diffraction Spectroscope Hearts & Arrows Loupe


UOM Price EACH


£53.95


 ie: Wooden base lengt 1mm  Widt 6mm  Heigt 1mm  iameter of blac olding discs mm  Ticness mm  Heigt of vieing loupe 9mm  iameter of vieing loupe mm  igt eigt aluminium construction


Code G31313 Description Hearts & Arrows Loupe Jadeite Filter


UOM Price EACH


£16.25


London Dichroscope


Incorporates to polariing seets mounted at rigt angles to eac oter alloing te ondon icroscope necessity to samples rays from to different areas of te same stone


xamples are vies of a Tourmaline/ruby gemstone it a ondon icroscope it a bac ligt Wit te same ray of ligt entering te gemstone bot sides sould be te same colour under te lter


Tis is a small pocet-sied instrument used for transparent coloured gemstones to differentiate genuine stones of te same colour from syntetics It is one of te most useful instruments for anyone buying coloured gemstones It is a uic and easy ay to separate stones suc as sappire-blue colour syntetic spinel from genuine sappire, or suc sappire-blue colour syntetic spinel from genuine sappire, or for separating green garnet from crome tourmaline or emerald


sed for differentiating beteen natural and dyed green and lavender ade


 ery effective tool in te use of separating red, blue and green stone from oters tat migt loo similar in comparison


 xtremely useful in detecting certain dyes treated on gemstones


Ho to use


1 Hold your adeite lter up over te gemstones) recommended not olding it directly up to your eye, but eeping it about six to eigt inces aay


 osition te uper pot igt Torc at te gemstone Item T33834) Te spot ligt source sould not be aimed troug te gemstone into te adeite lter tis ill not or ou must aim te spot ligt into te gemstone come bac out of te gemstone into te adeite lter for it to or properly


3 lace te gemstones) underneat te lter and in te pat of te strong spot ligt source Ideally lay te stones don on someting tat is brigt ite to elp it ligt return


4 Tere are many different colour properties tat can be exibited by gemstones troug te adeite lter ome gems even ave different colours based on te locality ere tey ere found Above I used te simplest test as an example Te roug gem above is green tourmaline Te adeite lter displays te stones are red, not green, ic means tat te green tourmalines contain cromium Wit tat information in and, tey can be called crome tourmaline and teir value goes up


Hearts & Arros oupe it double round base for small and large stones or cecing te ideal cut of diamonds


Wen vieed troug tis loupe an ideal cut stone ill so a symmetrical pattern of earts and te table side a pattern of arros


Tis instrument is a great sales aid for anyone o sells loose diamonds By simply looing troug tis earts and arros loupe, your customers ill be able to appreciate te perfectly cut diamond


We recommend purcasing te boo Gem Identication Made asy item C98) to elp you learn te many different ays te gemstone colour properties troug a adeite lter can elp you determine at ind of stone you ave Remember tat te colour identication is diagnostic, but not conclusive


eatures:  adeite lter diameter mm  olds neatly into leater case provided


verall sie: 9mm x 3mm x 1mm


Weigt: 4 grams Code


E33835


Description Jadeite Filter


UOM Price EACH


sed to test less pure transparent opaue) gem materials including roug and broen pieces, fasioned pieces, strings of beads, gems set in eellery, ornaments and carvings


rism spectroscope based on dispersion) is a tool for examining ic parts of ite ligt are absorbed by a gemstone as ell as by oter materials)


£24.50


Te ligt enters troug a narro slit and is ten dispersed troug a series of prisms Because prism spectroscopes are based on dispersion, te blue area


Hoever, it ill not separate natural gemstones from teir syntetic counterparts syntetic emeralds from natural emeralds or syntetic sappire from natural sappire) It ill enable you to easily separate single-refracting coloured gemstones from tose tat are double- refracting, and tus mae many important distinctions among loo-alie and imitations Anoter important benet is tat it can be used it gemstones tat ave not been cut or polised It is also very useful in cases ere cut stones ave suc a lo polis tat oter instruments suc as refractometers can not be used) or for eellery pieces in ic stones ave been set in a ay tat proibits te use of oter instruments


 ie engt it lense open 8mm and closed mm  Widt 3mm  Ticness 1mm  iameter of lter 1mm  Material lastic Blac  Weigt 16grms


Code E9519 Description London Dichroscope Prism Spectroscope


UOM Price EACH


£39.95


747


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