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Back To The Basics Of Opal Cutting: Cutting Rough ...

Opals are soft and a 220 or 320 grit-grinding wheel will suffice for course grinding. I prefer a 320 grit wheel for all opal roughing. Sanding: As a rule for progressive sanding steps, double the grit number for your next smoothest sanding abrasive. My sanding steps are: 320 sanding (or 280), 600 grit, 1200 grit and 3000 grit for pre-polish.


GemologyOnline.com • View topic - Salvaging Welo Ethiopian ...

Jan 21, 2015· Here's some helpful hints for salvaging Welo Ethiopian Opal: 1. In order to salvage the maximum amount of gem quality opal from the smaller cheaper pieces of Welo Opal rough, grind the pieces dry using a hand-held rotary tool fitted with rotary diamond point tips.


GemologyOnline.com • View topic - Hi from a Welo Opal addict.

Jul 28, 2014· I dust flat surfaces outside the grinding area before grinding and check the surfaces for dust build-up right after finishing my grinding and after about 1/2 hour to make sure no dust has leaked out. ... so you might have more luck going into a final polish. There are better sources of polishing grit than your local craft store, after all ...


GRINDING WHEEL and ABRASIVES BASICS

Grinding wheels usually will be between 24 and 100 grit. Honing stones and jointing stones and other polishing abrasives will be 150 grit and higher. Use a coarse grit for fast, aggressive stock removal and finer grits for less stock removal but better surface finish. Grinding wheel hardness


Jandagrinding Profile - opalauctions.com

positive Top Class 5.25cts Phoenix Feather Pattern Natural Ethiopian Welo Opal. Perfect buyer, fast transaction and nice communication. Thank you for your support, hope to see you again! Feedback from preciousopal. 6th Jan. positive ...


Polishing Precious and Common Opal - Rock tumbler

Precious opal and common opal can be shaped and polished in a rock tumbler. Be warned before you try it that this is a great way to waste a bunch of nice and often expensive opal if you don't know what you are doing or if you don't pay careful attention to what is happening in the barrel. Here are a few important things to keep in mind before you load the barrel...


Watch a black opal emerge from a piece of Australian rough ...

Shaping the black opal on cutting wheel 600 grit cutting black opal 600 grit opal cutting to fit a jewelry setting opal jewelery cutting ... Small Laser Prism Pattern Bright Unusual Welo Opal See more. ... This paper will describe the process of slabbing, shaping, polishing turquoise cabs using Foredom Handpiece and various grinding discs ...


How to Grind and shape rough opals with a grinder ...

Check out this video on how to grind and shape rough opals with a grinder. You can grind and shape rough opals using basic homemade equipment. You will require a Bench Grinder, a cut down plastic bucket, a length of pipe for the water feed, and a green grit wheel, for a low cost.


grinding of opal gemstone mines in ethiopia

Aug 30, 2016 boxite ore mine in ethiopia grinding of opal gemstone mines in ethiopia grinding of opal gemstone mines in ethiopia,Ore Crusher Welo Opal, Get Price And Support Online; opal mining idaho|roadheader crusher equipment The Spencer Opal Mines, Perfect For Kids - Idaho For 91 Days Spencer, Idaho, is a small town near the ....


Opal Cutting and Polishing- an extensive article about its ...

diamond grinding wheel. Depending on the rough stones you have, opal cutting and polishing can either start with the diamond blade or with the grinding machine. Sometimes you have to use the grinder to clean up the stone a bit so that you can either expose the …


grinding of opal gemstone mines in ethiopia

RARE Welo Ethiopia rough opal pieces. This section is dedicated to all the large and rare pieces of Welo Ethiopia opal rough we have had the pleasure of seeing over the years. If your interested in owning a huge Welo opal rough or finished email us we will find you a opal you will love.


2.94 CTS STUNNING DOUBLE SIDED OPALS WITH WAGON WHEEL

SEDA OPALS BLACK OPAL This is a natural stone mined in Lightning ridge.It i is a rare double sided stone with one side showing a wagon wheel pattern and the other with a jigsaw pattern.A nice collectors stone. This stone is suited to a ring or pendant .It is well polished and showing good fire.


Items Needed for Cutting and Polishing Opal - Johno's Opals

I would use 800 grit and 1200 grit wheels if you can get them. Dimond impregnated steel wheels are better because they feel much smoother and will cause less damage.Also the carborundum wheels can very quickly grind a nasty hole in your finger if you are not very careful. When cutting opal you need to keep the stone wet at all times for 2 reasons.


Opal care for opals and opal jewelry. A summery to help ...

Opal Care . Opal Care: There seems to be much confusion about the proper way to care for and clean opals and opal jewelry. To read about opal care please scroll past our product selection to the bottom of this page. If you have any questions on caring for your opal jewelry I …


How to Cut & Polish Opal Guide - Macs Opals

The opal cutter then utilizes a series of diamond grinding wheels, in order to shape and perfect the stone. Importance is placed on removing imperfections in the stone, such as sand spots, and removing saw marks and rough spots from previous stages. The face of the stone is shaped into a cabochon, which is a dome shape, and the final shape is ...


Hand Polishing an Opal - Black Opal Direct

Justin shows you how to hand polish an opal.. Recently I bought to you Steiner Florians's story about hand polishing opal. You asked the questions and Steiner was on hand to reply. How long does it actually take and can it really be that easy to do? Watch this video as I try the "The Steiner Technique" on hand-polishing an opal.


ETHIOPIAN WELO OPAL ROUGH - kingsleynorth.com

Mix size rough from 2 gram to 10 gram size pieces. Opal colors at its best. Three sizes to choose from. Sold by weight - per gram. Attention : Final billing weight may vary more or less. Dependent on material and current selection. The amount entered in


Opal Cutting | Village Smithy Opals

I wouldn't recommend Opticon for Welo opal as I've heard that it causes to stone to become permanently milky although I've yet to try it myself. ... And mostly I use a 360-grit grinding wheel as it lessens the chance of chipping or cracking. Opal in general is relatively soft (5.5 to 6.5 on the Mohs scale) and a 220-grit or 360-grit ...