Question

Question 1:

Read the passage given below and answer the questions/complete the

statements that follow: 5 marks

Chocolate diamonds are actually brown diamonds and compared to the well- known

white diamond they aren’t much worth. Diamonds are produced in mines. The best

known diamond mines are in Australia, South Africa and Russia. The largest diamond

mine was discovered in 1976 in the desert of Australia near a little creek named Lake

Argyle. Diamonds are created under very extreme conditions of pressure and high

temperature. It is a general misunderstanding that there exist only white colourless

diamonds. Actually, diamonds exist in many different colours.

Of all the diamond mines in the world, almost 80% of all diamonds produced are

brownish in colour. Because they were found in such large quantities compared to the

other coloured diamonds, they were considered as low-valued diamonds, only good for

the industrial sector. But, a famous man called Le Vian came with a marketing

campaign to increase the popularity of the chocolate diamond. Instead of calling it a

brown diamond, he gave it popular names like caramel, chocolate, cinnamon and

cognac. Since his marketing campaign, chocolate diamonds are becoming very popular.

The value of a diamond is based on its shape, brightness and colour. Because white

diamonds are rare, their value is based on the fact that there are not many white

diamonds around. But if you look at the shape and brightness, then the brightest

diamond in this world known to men is a brown diamond. Before the development of the

Argyle Diamond Mine in Australia in 1986, most brown diamonds were considered,

worthless for jewellery; they were not even assessed on the diamond colour scale, and

were predominantly used for industrial purposes.

However, marketing strategies changed in the 1980s and brown diamonds have

become popular gems. The change was mostly due to the supply: the Argyle mine, with

its 35 million carats (7,000 kg) of diamonds per year, makes about one third of global

production of natural diamonds; 80% of Argyle diamonds are brown. The percentage of

brown diamonds is lower in other mines, but it is almost always a significant part of the

total production. Consequently, scientific research on causes of brown colour in

diamond and ways to alter it has intensified(b) Why are the white diamonds rare?class 9 answer​

Answer 1

Answer:

Colorless Diamonds: The Most Rare

Because nitrogen, which makes for the yellow hue in diamonds, is the most abundant trace, in most cases, diamonds have a yellow hue. As such, white diamonds are graded on a scale from D-Z, with D being completely devoid of color and Z having the most noticeable color interferences.