Content posted by Jeweller Rodger

Business listing
18/04/2018 - 07:36

Handmade jewellery made in gold, platinum and silver , Gold & silver jewellery repairs, Setting of precious and semi-precious stones, Machine and hand-engraving, Pearl stringing, Valuation certificates, etc..

18ct white and yellow gold diamond wedding ring
Exclusive hand crafted jewellery
Exclusive hand crafted jewellery
silver tribal sun
Event
18/04/2011 - 09:35

Dates: Sunday 24th April 2011

Time: 1.30-2.30pm

Event location: Fish Eagle Green, Charles te Water street

Cost: Free

Event info: Police dogs are the ultimate working dogs. Obedient only to their master, these animals are dedicated to hard work, long hours of training and saving precious lives. Come and watch them in action on Fish Eagle Green on The Island.

Contact details: Amanda Dixon 072 949 3002. Email: info@slowfestival.co.za

Blog entry
10/03/2011 - 16:39

Contrary to popular belief, the vast majority of Jewellery is not "one of a kind." Today's fine Jewellery is usually machine-processed in some way. Modern methods have eliminated much of the time-consuming handwork, making fine Jewellery accessible to more people.

What is Cast:

Cast Jewellery is the most common type because casting is least expensive and still allows a variety of design and texture.

For cast Jewellery, the designer creates a model, from which a rubber mold is made. Liquid wax is poured into this mold to create a wax model of the piece. Plaster is poured over the wax model. When the hardened plaster is heated, the wax melts and runs out, leaving a plaster mold. Metal is poured into this plaster mold, to produce the final piece.

A number of molds can be made from the original piece, so that a large number of pieces can be produced at the same time.

Advantages: Casting is a relatively fast way to make many identical items. It is the least costly method and does not require the sophisticated equipment, space or manufacturing quantity necessary in the stamping process.

Disadvantages: Cast items are more porous and less durable than die-struck Jewellery

Handmade Jewellery :

These articles are literally made by hand, using only hand tools without the aid of mechanical devices. The jewelry is made from precious metal bar, plate or wire stock. The FTC requires an item advertised as handmade to be entirely crafted by hand and not contain cast or die-struck parts. This process is very time consuming and produces only one item at a time.

Advantages: A handmade item is unique.

Disadvantages: Well-crafted handmade items are expensive.

Stamped or Die-Struck Jewellery

A designer creates an original by hand, then metal dies are made from the piece. The jewelry is manufactured by stamping the hard metal dies into the softer precious metal.

Advantages: Die-struck Jewellery
is denser and more durable than cast jewelry, and it allows a higher polish.

Disadvantages: Stamping is more expensive than casting because of the equipment, factory space and time involved in making dies

Hand made Jewellery by Rodger
Hand made Jewellery by Rodger
Hand made Jewellery by Rodger
Hand made Jewellery by Rodger
Special
29/09/2010 - 21:00

Jewellery refurbishing done by Rodger The Goldsmith at Scarab Market while you wait. R20 per item or R50 for 3. Every Saturday from 08h00 - 13h00.

9ct white and yellow gold
Blog entry
28/06/2010 - 09:23

Gold has fascinated mankind right from the ancient civilizations till today. The Incas called gold “the tears of the Sun” whereas the Aztecs called it “the excrement of the Gods”! Though people collect gold for its value, most gold is found in the form of ornaments.

The chemical symbol for gold is Au, from the Latin aurum, which means 'shining dawn'. Aurora was the Roman goddess of dawn which links to the warm, yellow colour of gold. Gold and Copper are the only two non white coloured metals.

Gold and copper were the first metals to be discovered by man, around 5000BC, and together with silver these three metals are found in the metallic state in the earth's crust. Gold is still mined in its metallic form in over 60 countries around the world.

Gold is referred to as a precious and a noble metal. Gold has an excellent chemical stability with a high resistance to corrosion and oxidation. However, this is just one of the many properties that gold possesses, which when considered in combination with each other have led to a number of exciting and often unique industrial applications.

The purity of gold is measured in Carats. A Carat was originally a unit of mass (weight) based on the Carob seed or bean which was used by ancient merchants in the Middle East. The Carat is still used for the weight of gem stones where 1 carat = 200mg. For gold is is used to measure the purity where pure gold is 24 carats.

Gold is so ductile that an ounce of gold can be stretched to a length of over fifty miles or beaten into a sheet to cover a hundred square feet. A single gram of gold can be beaten into a sheet of one square metre.

Gold can be made into thread and used in embroidery.

The word gold derives from the Old English word 'gelo' meaning yellow.

Less the 50% of all the world's gold is still in the ground.

The largest gold nugget ever found weighed 195 pounds.

The Caratage System
Any caratage value lower than 24 is a measure of how much gold there is in the jewellery gold alloy. Thus 18 ct is 18/24ths of 100% gold = 75.0% gold. In fineness terms, this is described as 750 fineness, i.e. 750 parts of gold per thousand parts. For example, 22 carat is mathematically 22/24ths x 100 = 91.666% but the accepted international standard is 91.60%

The advantage of making jewellery in caratages lower than 24 ct, apart from price, is the wide range of colour that can be achieved, from socalled green, pale yellow, yellow, rose/pink to red as well as white, depending on the balance of other alloying metals used. The lower the caratage, the wider range of colour is possible. Additionally, properties such as strength and hardness are improved over pure gold, leading to improved wear and scratch resistance and less liable to distortion and damage.

Gold bars are sold in a wide variety of sizes. These range from 1 g to 12.4 kg. The 12.4 kg bar is equivalent to 400 oz. and is called a "good delivery bar." They are traded by banks and gold dealers.

All gold bars are sold at a premium. This extra cost covers the expense of manufacturing and marketing. This is usually 2 to 4 percent above the spot price of the gold content.

All gold bars are identified by information stamped directly on the surface. This information includes the name of the manufacturer, size of the gold bar, purity of the gold and identification number.

gold bike
i-want-my-pot-made-of-gold1
the-gold-mercedes
Gold Bar
News story
22/06/2010 - 16:46

Headquartered in Vienna, Austria, said the auction house Dorotheum, the world’s largest gold coin to be auctioned in Vienna on the 25th.

World’s largest gold coin