KOSSACK Emeralds. This is an introduction about the very Best cultured Emeralds And is intended to be for everyone who is interested In this Topic.

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1 K E K Gems International Co, Ltd 4/884 Moo Baan Sahakorn, Kehastarn 4, Seri Thai Rd, Klong Kum Bangkok, 14 Thailand Phones: +3191, Mobile: Faxes: , Internet: and Emeralds@PowerGemscom For a map go to Page 1/ 14 Bangkok, June 1, 4 Pages in this folder is: KOSSACK Emeralds This is an introduction about the very Best cultured Emeralds And is intended to be for everyone who is interested In this Topic Product Information (page # 1 and # ) Pictures of the Product (page # ) Price list for rough stones (page # 3) Price list for cut stones (page # 4) Scientific sheet (page # +) Product Information Since 1994, our company is The General Agent of major manufacturers of these finest created gems stones from Russia Manufacturers are located in the Novosibirsk and in the Moscow area There are major manufacturers in Russia, whereas we do have a contract as world distributor with 3 of them So KEK GEMS INTERNATIONAL CO, LTD plays a major role in this business and is not a second hand supplier! We are the owners of the trademark: KOSSACK Emeralds

$matched, whether it is the crystal structure, the hardness, the chemical compounds, the refractive index etc This cultured emerald is closest to its natural counterpart as can be In all terms it is$ an Emerald There is no way, to make a product better than this For reference, you may compare the scientific data, which is supplied to you at the end of this file, comparing: Natural Emeralds from

an Emerald There is no way, to make a product better than this For reference, you may compare the scientific data, which is supplied to you at the end of this file, comparing: Natural Emeralds from

2 Page / Hydrothermal Emeralds are manufactured in the most advanced hightech way that may copy the process of Mother Nature Only time has been accelerated All properties of the natural stone could be matched, whether it is the crystal structure, the hardness, the chemical compounds, the refractive index etc This cultured emerald is closest to its natural counterpart as can be In all terms it is an Emerald There is no way, to make a product better than this For reference, you may compare the scientific data, which is supplied to you at the end of this file, comparing: Natural Emeralds from different locations Flux created Emeralds from different manufacturers Hydro thermal Emeralds from different plants This will give you the best overview, based on facts Pictures of the Product: Rough full Crystal s different cut stones round shape cut These images have also been uploaded to our server at the Internet in a higher resolution, from where you may view or download them Here is the URL where you may find the links to the pictures: We do participate in the following Gem Shows: a) Bangkok Gem Show February b) Hong Kong Gem & Jewelry fair September

3 Page 3/ PRICE LIST for rough stones AVAILABLE QUALITIES US$/CT QUALITY DESCRIPTION CP Collector pieces, extreme small full crystals with seed for Scientists, Gemologists, Collectors etc X 1 Extra qualitysuperior clean stones no flaws, cracks, inclusions Large pieces A 9 Fairly clean stones with Maximum up to 3 cracks in a Full size crystal B Stones with 3 cracks in a Full size crystal C Stones with more than Cracks included stones Or cleaner, broken off pcs Or cleaner, smaller crystals D 3 Cracked stones, broken off Pieces included stones All prices are for rough stones in USD/ct, delivery ex our stock in Bangkok PRICES MAY CHANGE WITHOUT PRIOR NOTICE Updates of stock lots, prices and business situations can be found and pulled from our Multi Responder System from our Web Site at: You also may subscribe to our Emerald Newsletter by sending us an to: Subscribe@PowerGemscom with the subject emerald newsletter Thank you We appreciate your business and your interest in our products! KEK GEMS INTERNATIONAL CO, LTD Klaus E Kappler, managing director

4 Page 4/ KOSSACK Emeralds PRICE LIST for cut stones A) Facetted stones Our stones are cut to perfection at its best They re all clean They all are calibrated with tolerance of +/ 1/1 th of a mm All sizes and shapes from mm up are available The basic price is US$ per carat valid for most shapes and sizes For stones of 3mm and below a surcharge of US$ per pce is the general rule Some special shapes with low yield and weight per piece will also have a surcharge We also may supply you with included stones at USD/ct For large orders, ask for our proforma invoice and possible discounts A) Cabochons The same rules as for facetted stones apply also for Cabochons, except that they do have some inclusions and/or cracks In Cabochons this still does look clean The basic price on Cabochons is 49 USD per carat A surcharge of 3 US$ per piece is charged on stones of 3mm and below All shapes and sizes from mm and up are available For large orders, ask for our proforma invoice and possible discounts Delivery time in general is 13 weeks depending on the ordered quantities, shapes and sizes Most Standard shapes and sizes are available ex our stock Thank you for your interest and best regards, KEK GEMS INTERNATIONAL CO, LTD Klaus E Kappler, managing director Looking for more cultured Gems? We got available with us: Czokhralski (pulled) Alexandrite Flux created Ruby Amethyst & color quartz (hydrothermal) Ask us for details

5 Page +/ SCIENTIFIC SHEET about different Emeralds THE COMPARISIONS OF GEMOLOGICAL PROPERTIES OF NATURAL AND CREATED EMERALDS Origin Natural Emerald Chivor Colombia D e n s i t y 9 Refractio n Ne Indices No Bifrigence 11 1 Color In UV Darkred (3nm) Chelsea filter Darkred Main ab Sorption Lines (nm) Iic: 4; 9; 4; ; 8; 99 Ic: 431; ; 3; 8 Water type By ir Spectrum I and II Di Chroism Bluishgreen (IIc) h green Inclusions Internal features Threephase inclusions; pyrite; healed micro cracks Natural Emerald Micku Zambia 4 Hydro Thermal Emerald United Inst Of Geology and Geophysics, SB Hydrothermal Emerald Biron Australia Slightl y darkred, inert Inert, partiall y darkred Inert Inert Inert IIc: 4; 4; 9; 4; ; 8; 99 IIc: 4; 4; 9; ; 9; 4; ; 8; Ic: 413; 4; 431; ; ; 3; 8 IIc :4; 48; 4; 3; 4; ; 8; 83; Ic: 4; 48; 3; 4; ; 8; 83 I and II I and II I Blue (IIc), h green Blue, greenish blue (IIc) h green Greenishblue (Iic) hgreen Two phase inclusions; mica; healed micro cracks Two and three phase inclusions; hematite, phenakite; optical inhomogenity; healed micro cracks Two phase inclusions; gold, phenakite; optical inhomogenity; healed micro cracks

6 Hydro thermal Emerald Linde, USA Flux Emerald Design and Technological Inst of Mono Crystals SB RAS Flux Emerald Chatham, USA 4 Flux Emerald Gilson, France & Kyocera Japan Darkred (3n m) Light red (38 nm) darkred 3 red or orange red, not observed in more recent samples IIc:4; 4; 1; 34 3; 9; 81; Ic: 4; 4; 8 1; ; 3849; ; 88 IIc: 4; 4; ; 38; 84; Ic: 4; 98; 1; 31; ; 4; 84 IIc: ; 4; ; 4; Ic: 9; 88; 94; _ I absent absent absent Bluishgreen (IIc) h green Intense bluishgreen hgreen Intense green bluishgreen _ Two phase inclusions; phenakite, gold; optical inhomogenity, zonality parallel to the seed plate, healed micro cracks Veil inclusions of brownish flux; zonality Flux inclusions; phenakite Light inclusions of flux veil phenakite This file has been updated last on: June 1, 4

Selected Answer: a. an optical phenomenon resulting in 6 or 12 pointed star reflectance, caused by inclusion of rutile needles

Selected Answer: a. an optical phenomenon resulting in 6 or 12 pointed star reflectance, caused by inclusion of rutile needles Question 1 1 out of 1 points Asterism in corundum is: a. an optical phenomenon resulting in 6 or 12 pointed star reflectance, caused by inclusion of rutile needles Question 2 1 out of 1 points The value