1. Computer studies A Selina LI Block#3
Diamonds
Computer studies A
Selina LI
Block#3

2. BASIC INFORMATION
until now, diamond is the hardest natural substance discovered on earth
naturally come in all shades and colors of the rainbow
yellow is the most commonly found diamond color
white, red, blue and green diamonds are very rare diamond types
USA is the world’s top diamond consumer

3. WHAT EXACTLY IS A DIAMOND
form at high temperatures and pressures that occur in Earth's mantle about 100 miles down
discovered by deep-source volcanic eruptions
made up of extremely simple material
pure carbon (hardest naturally occurring mineral)
difference in molecular structure separates this precious stone from coal

4. Brilliant Diamonds diamond/other gemstone cut in particular form
brilliant-cut originally developed by Marcel Tolkowsky in 1919
modern brilliant-cut consists of 58 facets
too much shadow and light lost from the bottom-diamond lose brilliance
deep cuts allows light to escape from the sides-diamond appear dark and dull

5. usage Gem diamonds: -well-known jewelry, example: engagement ring
Industrial diamonds:
-material for heat sinks since they are good conductors
-used on drill bits, saw blades and grinding wheels
-membranes used in windows, openings of vacuum chambers, and x-ray machines

6. WHY ARE DIMONDS CONSIDERED AS GIRLS “BEST FRIENDS”??
In case you're wondering why “diamonds are a girl's best friend," it probably has to do with the fact that diamonds are the most popular gemstone in the world. One saying suggests that it first came to be popular from the title of a song of the same name, first introduced in the original Broadway production of Gentlemen Prefer Blondes. Marilyn Monroe's version of the song from the film version of the Broadway show was named the 12th most important movie song of all time by the American Film Institute. Later on, the advertising industry and Hollywood had inflated and raised the price of these glittering stones.
However, there’s another story explains why diamonds are so popular…

7. CUREENT
before the 20th century, diamond production amounted to a few pounds a year
BUT now…
sparkly, gorgeous, and can cost up to zillion dollars today
popular among women and marriage
more like a marketing story rather than romance

8. WAY BEFORE…
deposits were formed 900 million years ago
earliest diamonds were found in India in 4th century BC
majority transferred from India to China, through a trading route called the Silk Road
during the 18th century, diamond mines in India were mainly depleted
1866, new diamond mines were found by15- year-old Erasmus Jacobs when he was exploring the banks of the Orange River

9. DURING… 1870, huge amount of diamond found unearthed of South Africa
US was in Great Depression after world war I, diamond price collapsed
since diamond is largely available…
1938, diamond cartel De Beers began a marketing campaign
he controlled and inflated the pricing of diamonds
De Beers advertised diamonds as “universally recognized tokens of wealth, power, and romance” — emphasis on romance

10. LED TO De Beers developed a new image for this stone
writer Edward Jay Epstein suggested, “Both women and men had to be made to perceive diamonds not as marketable precious stones but as an inseparable part of courtship and married life.”
1947, the slogan “diamond is forever” was introduced
so the market would not be filled with second hand diamonds
many people believe diamond = forever love