Why Black Gold Jewellery?

Tantalising black gold jewellery displayed by fashion houses such as Jarretiere and Boucheron is indeed a pleasure to view. Never mind the fashions; still the black gold jewellery pieces give you more than their value in terms of aesthetics and cosmics. Let me give you a primer on how black gold is made as jewellery, minuses and pluses of adorning them.

How it is blackened?

Black gold is made in two distinct ways. One method uses inter-metallic compound of gold and cobalt along with certain other elements in trace quantity. Gold cobalt master alloy available in the market can be suitably enriched by the judicious use of Chromium, Copper, Iron, Titanium, Silver and one of the Platinum Group of Metals such as platinum for this purpose.

Second and most popular method is to use “Patination” which means applying a surface coating of black colour on the gold. There are several ways in which such surface coating is done.

1. Electro-deposition or Electroplating using black coloured Rhodium or Ruthenium. In this process gold is electrically attracted to the part consisting of Rhodium or Ruthenium and forms an electrochemical bond with the base metal with excellent adhesion. In the case of Rhodium black tint is brighter whereas Ruthenium bestows darker shade

2. An advanced technique of external coating is to opt for Amorphous Carbon with a patented process known as “Plasma Assisted Chemical Vapour Deposition”

3. Controlled Oxidation is another process making Carat Gold alloy containing gold Chromium and/or Cobalt to turn into black tone

4. Heat treatment uses Cobalt oxide to form a Cobalt layer on gold which is heat treated at 700 - 950 degree Celsius.

Drawbacks

Unlike yellow gold jewellery, black gold is not sturdy or strong in hardness. This is because Cobalt though much harder than gold is still considered a brittle metal and in terms of heaviness is just less than half of gold. Since gold is also somewhat brittle combining both these elements do not add up to hard and durable alloy. More blacker the gold less wear resistant it would be. In addition to wear and tear, black coating could abrade or fade over time. Fabricating black gold jewellery is faced with restrictions in the form of patented technology. Even if a jeweller succeeds in making one there is no guarantee it can be repaired or brought to its former glory if and when the colour is faded, scraped or peeled off.

Benefits

Pluses of black gold jewellery compensates amply for the risks noted above. Black gold primarily functions as a tool of contrast in the hands of a craftsman. He can use it to house sparkling diamond or other light coloured stones ranging between white and rose hues. Moreover, black gold gives a standalone look when mixed with white metals such as Platinum, Palladium, Tantalum and others. Wearing black gold gem & jewellery makes you a grounding person, able to put your foot down in making choices and decisions. Besides you are encouraged to stand firm and resolute in activities.

As you adorn black gold gem & jewellery, you feel energy beginning to flow from the feet and travel upwards in your body. That means bonus inner strength, focus, seriousness in outlook and high degree of concentration in what you do. Furthermore, you can easily counter the effects of bad vibes in the ambience. Granting you a sense of security and satisfaction black gold prods you to think and act as a noble person. Other goodies include authority, power and prestige, composure, rest and a feeling of zing within you, not to forget about that sexy style for which you are now a brand ambassador.

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Muthu Ashraff

Cosmic Adviser

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E-mail : cosmicgems@gmail.com

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