GemTec (Ex Hwa-il Machinery Co.), established in 1959, has specially been producing and supplying equipment, tools and its accessories related with the works of rock, lapidary, hot-fix
rhinestone, jewel & diamond, which are necessary for cutting, grinding, polishing, cleaning, thin section
& epoxy mold
manufacturing, etc. of raw materials, handiwork and appraisal, and has been supporting educational institutions and organizations about the information, training & installation of equipment and tools.
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Manufacturing Epoxy Resin Molds for Metal,
Mineral
Grains & Fossil,
Rock Chips
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Epoxy Molds of Metal, Mineral
Grains & Fossil,
Rock
Chips >
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 < Epoxy
Molds with Tags>
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Epoxy Molds in Box
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- The
metal,
mineral
grains and
fossil,
rock chips
will be
molded
by the epoxy
resin injected
after the
air in the
grain or
the chip
is
removed
in the vacuum
chamber.
- Manufacturing
the complete
molds
according
to the method
veriifed
by the research
institute.
- Polishing
the grain
or the chip
with diamond
powder
(1/2 or
1/4 micron)
at the finishing
stage.
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Service for Regional Lithological
Mapping of Naturally Occurring
Asbestos |
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We GemTec had manufactured
the rock thin sections with participating in the following research project
according to the contract with the Korean Society of Economic and Environmental
Geology:
- The title: Service for Regional
Lithological Mapping of naturally occurring asbestos
(Rock thin section manufacturing
service for researching the mineral characteristics of the ground and the
estimation of naturally occurring asbestos)
- The
term: Nov. 20, 2014 ~ Nov. 19, 2015
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3rd Shipment of Hot-Fix
Rhinestone Machines for Turkish Factory
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We
celebrate the 3rd shipment of hot-fix
rhinestone machines for Turkish factory.
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Liaison office in the Netherlands/Egypt
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Gemstones & Jewelry
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Gems Corporation
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Internet Sales Diamond
& Jewelry |

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Brazil Plus Gems & Minerals Ltda.
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Gemplus Corporation Ltd.
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Amethyst & Citrine for Faceting
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Materials
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Changsha Xinye Industrial Corp., Ltd.
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Synthetic Diamond
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Kam Technology Corp.
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Nitrides, Borides, Carbides & Inter -Metallic's
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Luoyang New High Technology Qiming Superhard Material Co.,Ltd.
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Synthetic Diamond
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Emerald & Diamond
Natural Brazilian Emerald & Diamond stones!
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[Glass
Processing] Hot
Fix
Rhinestone
Machine |
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1. GLASS FURNACE (is
used for glass powder (silica powder) mixing, melting,
pattern making and sorting of hot fix rhinestones.) 2. GRINDER & POLISHING
MACHINE (is used for
resin bonding, resin hardening, polishing and hot
fix grinding of hot fix rhinestones.) 3. VACUUM COATING
MACHINE (is used for
aluminium coating of hot fix rhinestones.) 4. BONDING WORK MACHINE
(is
used for bonding and hardening of nylon powder to
hot fix rhinestones.) 5. HOT-FIX ROLL
(is
used for rolling-over of hot fix rhinestone stones.) 6. ACCESSORY &
CONSUMER
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[Rock Processing] Ring
Mill 
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For
crushing rock
materials to
regular size
- Tightness
type to minimize
dust generation
- Pan
for powder collection
- Adjustable
of inlet gap
according to rock
size
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[Rock Processing] Ring
Mill 
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For
crushing rock
materials to
regular size
- Stainless
steel drawer
for powder collection
- Safety
cover
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[Rock Processing]
Gem
& Rock Saw 
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For
making thin
slab
- Attachment
of material
by vacuum
after bonding
to slide
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[Handiwork]
Furnace |
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[Rock Processing]
Thin Section
Working Table |
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[Gemstones]
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Gem Care
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Cautions
and tips for gem care, quoted from The Handbook "Gem
Care" - Korean language is only available.
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[Cut & Treatment]
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Pebble
Dyeing
- Korean language is only available. |
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Explanation on
how to dye pebbles
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[Cut & Treatment]
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The Optics of Brilliant-Cut Diamonds

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By W.R. Eulitz The foremost intention of this paper is to clarify the physical principles that determine the effect of any cut stone including diamond. (Note : This article is located at the section of "relevant data" in Korean Home)
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[Gemstones]
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Table of Properties of Gemstones
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 In order of the
figures of composition, hardness, specific gravity, reflective indices & birefringence - Korean language is only available
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Office: Rm No. 602-74, 105, Jungdong-ro 248 beon-gil, Bucheon-si, Gyeonggi-do, Zip Code 14548, Korea
| TEL: +82 (0)32 323 0862 | FAX: +82 (0)504 429 7706
Factory: 538-7, Opo-Ro, Gwangju-Si, Gyeonggi-Do, 12774, Korea TEL:
+82 (0)31 766 0862 FAX: +82 (0)31 766 0863
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Copyright @ 2002~2022 GemTec All Rights Reserved.
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