Rosalia's presentation from Senior 6

1. This is a small sample of what you've always
wanted to know about diamonds (or not ...)

2. FACTS ABOUT DIAMONDS
 The Diamond is the hardest substance known to man
and it is made of a crystallized carbon that has unique
powers of light reflection.

3. FACTS ABOUT DIAMONDS
• Since diamonds are composed of a single element, they
are the purest of all gemstones.

4. DIAMOND HISTORY
 The Greek word "Adamas" meaning
unconquerable and indestructible is the root
word of diamond.

5. DIAMOND HISTORY
 The first river-bed diamonds were probably discovered
in India, in around 800 B.C. The volcanic source of these
diamonds was never discovered, but the alluvial(1)
deposits were rich enough to supply most of the world’s
diamonds.
(1)the formation of new land by deposition of sediment by the sea or a river.

6. DIAMOND HISTORY
 In 1477, Archduke Maximilian of Austria
gave a diamond ring to Mary of Burgundy, thus
beginning the tradition of diamond engagement rings.
The reason a woman wears it on the third finger of her
left hand dates back to the Egyptian belief that the “vena
amoris” (vein of love) ran directly from the heart to the
top of that finger.

7. THE VALUE OF A DIAMOND: THE FOUR C’S
 Cut (Shape ): The cut is the factor that determines the
brilliance of a diamond. A classic round brilliant cut
diamond has 58 facets. There are twelve popular cuts of
diamonds.

8. SHAPE AND CUT
 The principal shapes of diamond.
Round Princess Emerald Asscher
Oval Trillion Marquise Heart

9. THE VALUE OF A DIAMOND: THE FOUR C’S
 Colour: Colourless and near-colourless diamonds are the
most valuable. Though most diamonds may appear
colourless to the naked eye, the majority of diamonds
contain slight traces or yellow or light brown when
viewed under a jeweller's loupe.
 There are diamonds of all the colours.
Very yellow Red diamond Intense green Deep yellow Black Brown yellow

10. THE VALUE OF A DIAMOND: THE FOUR C’S
 Carat Weight: a Carat is a standard unit of weight for
diamonds. Carats are divided into points. There are 100
points to a carat.

11. THE VALUE OF A DIAMOND: THE FOUR C’S
 Clarity: The clarity of a diamond is based on the
inclusions found in the stone. The fewer inclusions the
diamond has; the clearer, more brilliant and more
expensive the diamond will be.

12. Quality of diamonds (Classification of 19
producer countries)
Sort alphabetically Sort by better quality
 Angola ooooo  Angola ooooo
 Australia oo  Namibia ooooo
 Botswana oooo  Russia ooooo
 Brazil oo  South Africa oooo
 Canada ooo  Botswana oooo
 Central African Rep. ooo  China oooo
 China oooo  Sierra Leone oooo
 Dem. rep. of Congo ooo  Canada ooo
 Ghana ooo  Central African Rep. ooo
 Guinea ooo  Guinea ooo
 Guyana oo  Lesotho ooo
 Lesotho ooo  Dem. Rep. of Congo ooo
 Liberia o  Tanzania ooo
 Namibia ooooo  Venezuela ooo
 Russia ooooo  Australia oo
 Sierra Leone oooo  Brazil oo
 South Africa oooo  Ghana oo
 Tanzania ooo  Guyana oo
 Venezuela ooo  Liberia o

13. FAMOUS DIAMONDS
 The Blue Hope: 45.52 carats
 The Centenary: 273.85 carats
 The Cullinan Diamonds: 3.106 carats (rough)
 The Dresden Green: 41 carats
 The Idol’s Eye: 79.20 carats
 The Koh-I-Noor: 105.60 carats
 The Orlov 300: carats (rough)
 The Regent: 140.50 carats
 The Sancy: 55 carats
 The Taylor-Burton: 69.42 carats

14. FAMOUS DIAMONDS
The Blue Hope The Centenary The Cullinan The Dresden Green The Idol’s Eye
The Koh-I-Noor The Orlov The Regent The Sancy The Taylor-Burton

15. DIAMONDS AND SOCIAL CUSTOMS
 Diamonds have always been part of engagement
proposals and wedding ceremonies.
 The Diamond is the birthstone of April and the
anniversary gemstone for the 10th and 60th years of
marriage.

16. FAMOUS QUOTATIONS
 “A diamond is a chunk of coal that is
made good under pressure” -Henry Kissinger
 “Diamonds are a girl’s best friend
and a man’s worst enemy!” –Author Unknown

17. And finally...