STANDARD TESTING INCLUDES BUT IS NOT LIMITED TO. Weights taken with quality Tanita Jewellers scale.
Inspection with black and white lights using a jewellers loop and a microscope. Diamond & Precious stone tests performed digitally & or with a manual refractometer, spectrometer, etc.Gold, Platinum & Silver tests digitally & or with a manual acid test when needed. NOTE: UNLESS STATED OTHERWISE THE GRADING OF STONES IS CONDUCTED IN THE SETTING. THIS CAN CHANGE THE COLOUR SLIGHTLY MAKING IT HARD TO GIVE A TRUE GRADE AND WEIGHT. TO INSURE ACCURATE INFORMATION IN OUR LISTINGS. ALSO TO PUT YOUR MIND 100% AT EASE, YOU KNOW WHAT YOU ARE GETTING. WE USE TOP QUALITY EQUIPMENT. Melt price is the value of materials before craftsmanship and labor costs.
Your safe option is to look at the mass production Jewellers like Prouds or Angus & Cootes for examples of items similar in design and of the same weight and type of materials. This will give an indication to the value of labor etc. Our team of 4 has OVER 90 yrs combined experience specializing in sales and valuations of antiques and art.
With a love for and great interest in antiques, cars, jewelry, books to boating and fishing. We find, research and then bring great items to market for sale.
T get inquiries from other collectors or even worse criminals. We know a network of independent valuers in Sydney and Melbourne whom are all registered and we are happy to point you in the right direction if a valuation is required.All items are sent registered sign for and insured. We are happy to combined items for NO EXTRA CHARGE given the weight does not go over original package limit. INTERNATIONAL BUYERS WELCOME, PLEASE SEND ADDRESS OR REQUEST INVOICE AND TOTAL AMOUNT WILL BE SENT WITHIN 24HR.
Simplifying Precious Stones, Understanding Grading & Quality. There is a lot to know about precious stones and it can be very hard to determine their true value. In this article you will find out the must know basics and what jewelers call the 4 C? For the most part in smaller point (0.01-0.02g) stones grade is not to important and even in larger stones as many just want to own Diamonds or alike. The following is a simple explanation of the importance of each of the 4 C?
CARAT: CT = 0.2g. The size of the stone greatly affects the value. This is NOT true, as larger stones are found less often, hence are worth more per carat as you go up in size. CLARITY: Is very important in grading as flawless stones sell for a premium because they are not as common in the natural world. Flaws in the stone matter the most in the cutting and polishing aspect and may slightly affect its light reflection hence luster.
Flaws are not all bad as they can be the indication of a natural stone and act as a fingerprint as such being every flaw is unique in its own way and some individual stones have commonly found flaws helping to identify them. See Below on understanding clarity and colour ratings IF, VVS, VS, etc? COLOUR: Is very important as for clear white diamonds the lack of colour helps it luster once cut and colourless stones fetch a premium.
Then let's say you are looking at a pink diamond. The more pink tone, the higher the value as with other coloured stones, in general if coloured then the depth of colour is important. CUT: Affects not only the value, look of the stone but also the luster and starting weight versus the finished weight. Simply put when you see a sparkle from a stone it is light reflecting and bouncing through the stone back to your eye. The more flat and angled faces/facets (surfaces) you have cut in your stone the more the light bounces around inside the stone hence appearing more sparkly.
An old cut stone is normally a weight cut as will not lose much weight but does not have many faces/facets. A brilliant cut stone is cut to precise angle to help bounce light around inside and has the most faces/facets with excellent luster and light return.
Also compared to an old cut the brilliant cut loses a lot more weight in the cut and polish and is much more time consuming. The natural shape along with any flaws will affect what the stone can and might be cut and formed into.It is due to these factors the cut can differ the value of a stone so much. SYNTHETIC, LAB CREATED, SIMULATED STONES being made in a lab with no contaminants or variables with heat and pressure they are normally flawless. This is the easiest way to pick them along with normally having superb colour or lack of depending on what they are meant to simulate. They will normally be made of the exact same minerals/chemical compounds as found in naturally occurring stones. They will test, refract light and have the same brilliance ratings as a natural stone.
They are most commonly found in cost effective items of jewelry and used in commercial applications for watch makers to diamond tipped commercial equipment, etc, etc. GRADE / GRADING will look at all of the above but with current techniques and equipment it is still hard to detect certain treatments like heat colour treatments and synthetics. This is a very general breakdown of the 4 C? Each one of them has a massive amount of information to know and learn. There are lots of paid classes you can take, but luckily lots of information is available on the internet.Just make sure you find credible information to rely on and if unsure cross reference 2 times, to be sure,,, to be sure,,, to be sure? UNDERSTANDING CLARITY AND COLOUR RATINGS, VVS, VS, AAA, ect.
They see something in a colour tone they like and that is that. For those who want to know the basics and what the industry classes as the better quality and colour, I will cover a few of the main stones in this article. S now used in coloured stone grading also but it does differ for coloured stones.Also with the range of coloured stones there is, ratings differs from one type to another but all coloured stones can normally be placed in 3 to 4 categories/groups. IF = Internally flawless and free of inclusions when viewed under 10x magnification. VVS = Almost 100% clean but just not quite. Clean and clear to the naked eye with very, very slight inclusions.
Inclusions will be hardly noticeable under 10x magnification. VS = Clean and clear to the untrained naked eye with a very slight inclusions.Slight inclusions will be visible when viewed under 10x magnification and will be visible to a well trained eye without this aid. Inclusions are just noticeable to most without any magnification. Inclusions are obvious and can be seen with the naked eye. Transparent = Light will pass through the stone lighting it up with ease being as the name suggests, transparent but not clear and may have other inclusions or rutile. Translucent = Light to pass through, but not transparent. Opaque = Will not allow any light to pass through. COLOUR is rated differently depending on the type of stone. Most want to know about clear colourless diamonds and then the most popular coloured stones like Rubies, Emeralds and Sapphires. In general for coloured stones the deeper and more rich the colour the more prized and valued it will be.
There is NO standard ratings for coloured stones like diamonds and this makes it very hard to grade them. Iv tried to keep this general and easy. There are lots of sites showing stones and ratings but keep in mind that your screen monitor will change the colour and you should only rely on dependable sources of information.
DIAMOND colour ratings for general purposes can fall into groups with the higher values being the better colours in that group. Starting at D ending with Z they are as follows.
D colour stones are very very rare. E, F = Very minor colour can be seen by a well trained eye. G, H = Minor colour present, much more noticeable when side by side to better grades of stone. I-J = Slightly noticeable colour to the stone.L-Z = Noticeable colour to the stone. Most mass production jewellery uses L-P colour stones. Only a very select few will use D-H colour with the I-P a lot more common. RUBIES are grade on a AAA to A but some go as far as B. Also a number system is used by some people. There is no industry standard. It is hard to grade these stones as such a variation of tones and only 3 to 4 categories they fall into. AAA = Blood red also known as Pigeon Blood Colour. AA = Strong, Vivid red through to Red colour.
A = Light red through to rich pinks. B = Pinks and lighter. Blood red rubies are what the market prizes and pays the most for. EMERALDS are a bit easier to rate than rubies but in general can rate on a 1-10 scale 10 being the best colour, a deep rich green or a AAA-A system. I'll use for this example a 1-10 system.
9 = Very very high gade of deep rich very dark green. 8-7 = Very good stone of dark to dark medium Green tone. 6-5 = Good colour of medium green.
4-3 = Of a fair / ok green colour. 2-1 = Lower grade stones of light green tones. HUE also has to be taken into account with stones as it affects the value greatly.Hue is referring to the stones main bais colour mixed with another tone. So lets take Green Emeralds for say. They have base of green but can appear to the eye as bluish green colour to a yellowish green tone. This is apparent when comparing different tones to each other and does affect the value. Meaning of Carat and Percentages of Pure Material for Gold, Platinum & Silver.
Without complicating you with the numbers 1ct is equal to 0.2g of PURE material. GOLD: 9ct or 375 = 37.5% pure gold content hence, it? 14ct or 585 = 58.5% pure gold content. 18ct or 750 = 75% pure gold content. 22ct or 916 = 91.6% pure gold content hence its occasional 916 mark.
24ct = 99% - 99.9% pure gold also marked 990 or 999. 24ct is the purest form but hardly ever if not never found 100% pure. It is also the softest of all due to having less metals mixed with it and why most favor 18-22ct for a mix of strength and high purity of gold in jewelry. To find out how much gold is in your jewelry you need to know the carat and weigh it accurately.
S say you have 10g 9ct/375 gold. Then you can easily find out 37.5% of 10 is 3.75g pure gold in your item. The 3 decimal number hallmarks also indicate the percent of pure metal for Silver and Platinum.
Platinum is mostly found in 85%, 90%, 95% and 99.9%. Similar to Silver 80%, 92.5% (sterling) 95.8% (Britannia) and 99.99%. METALS MIXED and amounts of each vary depending on the base type e.
Gold, platinum but mostly consist of Copper, Zink, Nickel, Silver and Palladium Alloy. It is because of these metals and amounts that 9ct/375 gold can tarnish a lot quicker than other more pure forms.22ct/916 - 24ct/999 hardly tarnish, if not at all. Caring, Cleaning and Maintenance of Jewelry. Best Cleaning and Maintenance MUST KNOWS for Jewellery. When you get your new or reconditioned jewellery it sparkles and shines but after a bit of time they always seem to lose their luster. This article covers my most used techniques and costs involved, along with the do's and don?
Ts in looking after your precious metals and stones. It will help keep your prized possessions in good condition, looking great.
MAINTENANCE PRECIOUS METALS: Most items of jewellery are scratched and slightly discolour due to many factors, lower carat metal items and silver will also tarnish over time. Many items are coated with special plating that is extra shiny and hard that wears away over time.
In the ideal world of looking after your items you should: Not come in contact with Chemicals Chlorine or Bleach Cleaning products. Not come in contact with Perfumes and Antiperspirants. Not come in contact with Makeups and removals products. MAKE SURE TO WASH WELL UNDER FRESH WATER IF CONTAMINATED. Some Chemicals will discolour your precious metal, whilst lots of makeups and cosmetics have very small particles of metal in them that will be abrasive to your precious metal.Now understandably you can never avoid all contact but these mentioned are the most common forms of exposure to be mindful of. PRECIOUS STONES: Lots know diamonds are the hardest substance on earth and assume they will never scratch or break.
These stones can even break and fracture due to flaws and cracks. Whilst coloured stones can lighten in tone over time due to the UV radiation from light exposure. By avoiding heavy knocks and bumps you will limit the risk of making any flaws or cracks worse which may have resulted in breaking the stone. Avoiding sun is next to impossible, especially in a country like Australia.
Make sure to store your coloured stones in a closed thick walled jewellery box while not in use and never in direct sunlight. A metal box is best for this, not plastic. RECONDITIONING, CLEANING, CUT, POLISHING AND BUFFING Don?There are lots of methods out there but you need to keep in mind, unlike diamonds and most stones, your precious metals are soft and will scratch easy and this reduces shine. ULTRASONIC CLEANING / POLISHING is by far the easiest and long term and is a cost effective way of maintaining your item? It is the go to for professional jewellers whom use special solutions in them. You can clean almost anything in them from knives and forks to glasses and jewellery. For items with small nooks and holes there is no better. The downside is not all stones, nor ANY glued stones, should be washed using an ultrasonic system. POLISH AND FINAL BUFF is normally all your item will need. This is best done with a microfibre cloth and a compound to assist. I polish with a Red Rough and finish with a Blue Rough. Most important is to know the size of particles in your compound as all differ brand to brand, yet are called and look the same. DEEP SCRATHCES AND PITTING requires cutting back (sanding) to remove these marks and as such is best done by a jeweler, who will not remove too much material whilst keeping its shape. Then polish and rebuff it making it seem brand new. The cost involved varies on the design and complexity of the piece. GENERAL CLEAN AND SHINE is easy safe and cheap with warm soapy water and an old used soft bristled toothbrush (if new rub, hard on a smooth stone or alike to soften it). Soak for ten minutes minimum and give a very gentle scrub. NOTE: DO NOT SOAK ITEMS WITH GLUED IN STONES AND DO NOT SCRUB FROM THE BACK OF THE SETTINGS as may loosen glue and have stones fall out. Just dip your brush in soapy water and tap of excess water then scrub. S my go to cleaning method aside from ultrasonic. GOLD if pure will not tarnish but lower carats will due to the other metals. I use the same method for POLISH AND FINAL BUFF this will get your gold sparkling. SILVER tarnish is cost effectively and easiest removed with simple items found in most homes. You will need 3 layers of folded aluminum foil in a bowl. Place your item on top of foil. Sprinkle 1 tablespoon of Bicarb Soda, 1 good pinch of salt and a drop of dish washing detergent on top. Boil 400-500ml water and cover item, soaking for 1 min, turning also helps. Make sure lots of metal is touching as it creates a chemical reaction and removes the tarnishing, no scrubbing required, simply soak and rinse.
Repeat with fresh foil if needed. Note this removes the tarnishing only not metal and will need a final polish and buff. For a very little outlay of around 0.25-0.50c per treatment you will be amazed with the result. I hope this info has been helpful, even though it is general. We tried to answer the most common questions asked to us.If you have any questions not covered in the above please ask and we will advise you if we can. The item "SALE- 9 ct/k 375 Gold Rope Link Bracelet Solid SALE" is in sale since Tuesday, August 21, 2018. This item is in the category "Jewellery & Watches\Fine Jewellery\Bracelets". The seller is "overstock-liquidation-auction" and is located in Sydney CBD.
This item can be shipped worldwide.