166.60 CTS ANDAMOOKA ROUGH SLAB -IDEAL FOR EARRINGS [BY8993]

Item Information

Dimensions (mm) 45 x 44 x 7mm
Weight (carats) 166.6 carats
Colors
ANDAMOOKA MATRIX ROUGH SLAB
[SAME TREATMENT APPLIES TO FAIRY OPAL]

This is a natural  andamooka matrix rough slab.We have  treated only once to show the colour bars. This piece is ideal for cutting earrings as the colour bar is in stripes and you can cut a few sets out and re treat for stunning earrings.  There is a lot of wastage in the bulk rough we buy so we only pre shape for you.
You can reshaped it or cut into smaller stones but you will have to retreat it.
Mined in Andamooka South Australia
TREATMENT FOR ANDAMOOKA MATRIX WITH SUGAR ONLY.
MATERIALS
250 grams glucose,white castor sugar,pot or pressure cooker,plastic tweezers.
STEPS
-Preshape the material

- Thoroughly dry the material in oven sun or hairdryer. You can also soak in acetone for 10 minutes to dry the stones out.
- Put water in pot on low temperature and add glucose and castor sugar. DO NOT BOIL.
-Place warmed stones into warm solution and cover the stone with liquid.
-leave on low temperature for 24 hours but DO NOT BOIL.
-Remove with tweezers and let cool.Use a paper town to wipe away access.
The next steep is to carbonize the sugar in the stone. Place the stones on a metal or Pyrex dish and place in a kiln at 500 F degrees for one hour.This will burn or carbonize the sugar in the stone.
_When the stones have cooled clean on a grinding wheel.
Remember to take all precautions with gloves and mask and clothing with good ventilation.
This is a natural product so results may vary a bit due to how porous the sandstone is. Some material will have to be treated a few times to get good results. You can also experiment with various temperatures as i like to cook with lower temperatures.
Remember to have fun!
WE HAVE TAKEN THE PHOTO WITH THE ROUGH WET.
In the learning section of opal actions there is details on how to treat with acid and sugar but this sugar only gets good results on porous materiel
This material is very solid
-

POLISHING
 The surface is usually porous porous so its hard to get a good finish but this should give good results and you may be able to polish as is..
You can polish as a natural stone or coat it with resin to get a better finish.
We suggest a polymer resin as its stable.inert and nontoxic and dosent yellow..Check out our listings of fairy opal polished in sedaopals.Some of there were polished in china under vacume with a amazing finish.
We have also used mono-compontent thermo set resin,cynoacrylates and 2 parts resin but these can turn yellow over time. ive even heard of nail polished used and hardened under uv lights.



The weight and size is app
You have not bid on this auction.

Closed

14 bids placed so far

$31 maladay
$30 leeloopush
$30 maladay
$24 leeloopush
$23 maladay
$17 leeloopush
$16 gaylord
$14 gaylord
$13 franklypog
$5 franklypog
$4 gaylord
$3 franklypog
$2 sid1
$1 chikuraloomis
Add to Watch List Ask a Question * All prices in USD

Audit Information

The Opal Sheriff program allows our members to request an audit on any auction, which is completed by an independent Gemologist who assesses the accuracy of the item description and pictures.

Pricing & Details

Bid Increment $1
Starting Bid $1
Auction ID 905284
Watchers 14 watching
Viewed 210 times
Starts 28th Jun 2020 6:00pm PDT
Ends 26th Jul 2020 6:03pm PDT

Shipping & Insurance

Provider Shipping Transit
Express Shipping $33.00 14 days
FedEx $29.00 10 days
Registered Shipping $12.00 21 days
Shipping Insurance all providers $7.00 (optional)

About Seda Rough Opals

You May Also Like