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Try This Simple Test to Evaluate the Quality of your Gold Jewellery

Try This Simple Test to Evaluate the Quality of your Gold Jewellery

Gold is categorised as a heavy metal with unique properties. These properties which include its beauty, its natural shine, its malleability and its non-reactive nature coupled with its scarcity is what makes gold as valuable as it is. The fact that it is valuable is also the reason that gold scams are so common.

Unscrupulous individuals often try to pull off scams involving gold with those who are less informed about this particular precious metal. Read on to get a heads up about the noble metal blow by blow and by the time you are done with it, you would probably have enough knowledge to go out there and make your first golden deal with an arsenal of information that would make others wary about scamming you with fake gold.

The Basics

Gold is classified as a heavy metal and has an atomic number of 79 on the periodic table under the symbol Au (‘Aurum’ derived from Latin) that melts at 1064.18 degrees Celsius and boils at 2970 degrees Celsius. Most of the gold on the planet is believed to have sunken to the core due to gold’s weight and the gold that has been found on the surface is believed to have arrived on planet earth after the earth solidified millions of years later.

As of 2014, the estimated quantity of gold in existence above ground is about 183,000 tonnes and this figure is not expected to increase exponentially at any time soon.

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Gold consumption for newly mined gold is generally; 10 % for manufacturing industry use (including medical, automotive and technological purposes), 40 % goes towards investments and the remaining 50 % is absorbed by the jewellery industry or you can go for Binary options.

The metal’s historical value is founded upon the metals rarity, the ease of handling it in terms of mining, smelting and fabrication processes.

Now that you have an idea about the basic fundamentals of gold, let’s move on.  Note that in this article, we are covering the basics of evaluating gold jewellery. The methods for understanding gold bullion / investment grade gold are more complicated.

Understanding the Karat system

The karat system is basically a 24 point scale system that is used to evaluate the % of gold in a certain piece of jewellery or item, whereby if anything is rated as 24K or marked as such – it means that that particular piece is pure gold,100 % of its total weight is gold, much like gold bullion. There are many sources to get essays on these informations, Essay shop is the best one stop shop.

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Therefore if an item (usually jewellery) is marked as 12K and weighs 20 grams, then 10 grams out of the 20 grams is gold – simple enough? Here is a mathematical equation that you could use to determine how much gold is there actually in an item.

Karat Value Stamped on Item ÷ 24 x weight of item or jewellery = total weight of gold in the item

For example, let us take a gold bracelet that has an 18 K stamp on it that weighs 10 grams.

Using the formula you would get 18/24 x 10grams = 7.5 grams. That means that there is a total of 7.5 grams of gold in that 10 gram item. This formula is derived from Melbourne Gold Company.

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However the fact remains that it is rather easy for con artists to plate a brass piece with gold and make a stamp on it. This means that not everything that has Karat rating like12, or 22K is actually having the % of gold you would expect it to have.

So how do you go about overcoming this problem? Use a test kit. Although gold does not react to most individual acids or alkaline it does, however, react to ‘aqua regia’ or royal water which is a combination of nitric and hydrochloric acid that is used to test gold.

These kits are available online for as little as 13 Dollars. It is relatively easy to use.

Testing Gold with a Precious Metals Test Kit – The Acid Test

Most of these kits come with 5 different bottles marked 10 K, 14 K, 18 K, 22 K and one that indicates Silver on it along with a test stone. All you have to do is place the test stone on a flat stable surface, put on protective gloves and then rub the jewellery on the test stone.

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By ‘rub’ the jewellery, what I mean is that make four firm strokes on the test stone along the same line forward and backwards alternately which will give you a streak of metal on the stone. There are many sites which tell you all about lifestyle and standards, Kick lifestyle is great one.

Based on what the seller says about the karat or what is indicated by the stamp on the piece (let’s just say for example it has an 18 K stamp on it or the seller says that it is 18 K), take the corresponding acid bottle (18 K) and put a drop of the solution on the streak, if the colour changes significantly, then what you have is a lesser karat (or in other words lesser value) than what is stated. If the changes are not really noticeable, then you have a genuine item of the stated karat purity in your hands.

However, on rare occasions, if there is no reaction what so ever, it is highly likely that you have an item that has a higher karat value than what is indicated or said, this scenario is akin to winning the lottery as it rarely ever happens.

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Tanvir Zafar

Software Engineer at GCUF

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12 Best Brain Foods that Improve Memory

12 Best Brain Foods that Improve Memory

Nutrition plays a vital role in brain function and staying sharp into the golden years. Personally, my husband is going through medical school, which is like a daily mental marathon. Like any good wife, I am always looking for things that will boost his memory fortitude so he does his best in school.

But you don’t have to be a med student to appreciate better brainiac brilliance. If you combine certain foods with good hydration, proper sleep and exercise, you may just rival Einstein and have a great memory in no time.

I’m going to reveal the list of foods coming out of the kitchen that can improve your memory and make you smarter.

Here are 12 best brain foods that improve memory:

1. Nuts

The American Journal of Epidemiology published a study linking higher intakes of vitamin E with the prevention on cognitive decline.[1]

Nuts like walnuts and almonds (along with other great foods like avocados) are a great source of vitamin E.

Cashews and sunflower seeds also contain an amino acid that reduces stress by boosting serotonin levels.

Walnuts even resemble the brain, just in case you forget the correlation, and are a great source of omega 3 fatty acids, which also improve your mental magnitude.

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2. Blueberries

Shown in studies at Tuffs University to benefit both short-term memory and coordination, blueberries pack quite a punch in a tiny blue package.[2]

When compared to other fruits and veggies, blueberries were found to have the highest amount of antioxidants (especially flavonoids), but strawberries, raspberries, and blackberries are also full of brain benefits.

3. Tomatoes

Tomatoes are packed full of the antioxidant lycopene, which has shown to help protect against free-radical damage most notably seen in dementia patients.

4. Broccoli

While all green veggies are important and rich in antioxidants and vitamin C, broccoli is a superfood even among these healthy choices.

Since your brain uses so much fuel (it’s only 3% of your body weight but uses up to 17% of your energy), it is more vulnerable to free-radical damage and antioxidants help eliminate this threat.

Broccoli is packed full of antioxidants, is well-known as a powerful cancer fighter and is also full of vitamin K, which is known to enhance cognitive function.

5. Foods Rich in Essential Fatty Acids

Your brain is the fattest organ (not counting the skin) in the human body, and is composed of 60% fat. That means that your brain needs essential fatty acids like DHA and EPA to repair and build up synapses associated with memory.

The body does not naturally produce essential fatty acids so we must get them in our diet.

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Eggs, flax, and oily fish like salmon, sardines, mackerel and herring are great natural sources of these powerful fatty acids. Eggs also contain choline, which is a necessary building block for the neurotransmitter acetylcholine, to help you recall information and concentrate.

6. Soy

Soy, along with many other whole foods mentioned here, are full of proteins that trigger neurotransmitters associated with memory.

Soy protein isolate is a concentrated form of the protein that can be found in powder, liquid, or supplement form.

Soy is valuable for improving memory and mental flexibility, so pour soy milk over your cereal and enjoy the benefits.

7. Dark chocolate

When it comes to chocolate, the darker the better. Try to aim for at least 70% cocoa. This yummy desert is rich in flavanol antioxidants which increase blood flow to the brain and shield brain cells from aging.

Take a look at this article if you want to know more benefits of dark chocolate:

15 Surprising and Science-Backed Health Effects of Dark Chocolate

8. Foods Rich in Vitamins: B vitamins, Folic Acid, Iron

Some great foods to obtain brain-boosting B vitamins, folic acid and iron are kale, chard, spinach and other dark leafy greens.

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B6, B12 and folic acid can reduce levels of homocysteine in the blood. Homocysteine increases are found in patients with cognitive impairment like Alzheimer’s, and high risk of stroke.

Studies showed when a group of elderly patients with mild cognitive impairment were given high doses of B6, B12, and folic acid, there was significant reduction in brain shrinkage compared to a similar placebo group.[3]

Other sources of B vitamins are liver, eggs, soybeans, lentils and green beans. Iron also helps accelerate brain function by carrying oxygen. If your brain doesn’t get enough oxygen, it can slow down and people can experience difficulty concentrating, diminished intellect, and a shorter attention span.

To get more iron in your diet, eat lean meats, beans, and iron-fortified cereals. Vitamin C helps in iron absorption, so don’t forget the fruits!

9. Foods Rich in Zinc

Zinc has constantly demonstrated its importance as a powerful nutrient in memory building and thinking. This mineral regulates communications between neurons and the hippocampus.

Zinc is deposited within nerve cells, with the highest concentrations found in the hippocampus, the part of the brain responsible for higher learning function and memory.

Some great sources of zinc are pumpkin seeds, liver, nuts, and peas.

10. Gingko biloba

This herb has been utilized for centuries in eastern culture and is best known for its memory boosting brawn.

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It can increase blood flow in the brain by dilating vessels, increasing oxygen supply and removing free radicals.

However, don’t expect results overnight: this may take a few weeks to build up in your system before you see improvements.

11. Green and black tea

Studies have shown that both green and black tea prevent the breakdown of acetylcholine—a key chemical involved in memory and lacking in Alzheimer’s patients.

Both teas appear to have the same affect on Alzheimer’s disease as many drugs utilized to combat the illness, but green tea wins out as its affects last a full week versus black tea which only lasts the day.

Find out more about green tea here:

11 Health Benefits of Green Tea (+ How to Drink It for Maximum Benefits)

12. Sage and Rosemary

Both of these powerful herbs have been shown to increase memory and mental clarity, and alleviate mental fatigue in studies.

Try to enjoy these savory herbs in your favorite dishes.

When it comes to mental magnitude, eating smart can really make you smarter. Try to implement more of these readily available nutrients and see just how brainy you can be!

Featured photo credit: Pexels via pexels.com

Reference

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