Diamonds & diamond grading final exam
Study online at https://quizlet.com/_eftpjm
1. Bourse A diamond buying and selling club
- they have them in trading centers
2. Peridotite A type of rock that diamonds form in
- igneous rock ( formed from a molten state)
- most diamond form in this rock
- has consistent release of carbon
3. Eglogite A type of rock that diamond form in
- metamorphic rock (rocks that have been altered by heat and pressure
- does not have a consistent release of carbon
4. How far beneath 90-140 miles (140-220 kilometers)
the earth do dia-
monds form?
5. Drift A horizontal tunnel drilled through a diamond pipe
6. De Beers Consol- the owners of a farm where one of the first diamond rushes took place.
idated Mines Ltd.
was named after
7. The Central Sell- A rough diamond distribution agency
ing Organization - served as this until 2001
(CSO)
8. Pipes The deep vertical formations through which diamonds travel to the surface
9. Chambering An older underground mining technique
- expensive & dangerous so no longer used
- block caving is the alternative to this
10. Most of the dia- pipe, alluvial, and marine deposits
monds that come
, Diamonds & diamond grading final exam
Study online at https://quizlet.com/_eftpjm
from Africa are
recovered from
11. Most of the dia- Primary Sources
monds that come
from Russia are
recovered from
12. What is the spe- 3.52
cific gravity of a
gem-quality dia-
mond?
13. Diamonds are Marine deposits
more concentrat-
ed in which type
of deposit?
14. The first step in look for the oldest parts of the earth's crust
exploring for dia-
monds is to
15. The diamond the world's supply of diamond rough has increased
industry has - this means diamonds are available to more people
changed dramat-
ically in recent
years because
16. The Argyle mine India
in Australia con-
tributed to the
rise of the cutting
industry in
, Diamonds & diamond grading final exam
Study online at https://quizlet.com/_eftpjm
17. What is the soft- Dodecahedral
est crystal direc-
tion in diamond?
18. What crystal sys- Isometric or cubic crystal system
tem does dia-
mond belong to?
19. What are dia- Cubic ( runs horizontal), octahedral (on face), dodecahedral (runs vertical)
mond's 3 internal
crystal planes?
20. The crystal octahedral planes
planes most suit-
able for cleaving
a diamond are
the
21. Another name isometric
for the cubic sys-
tem is
22. Blocker Polishes the crown and pavilion mains
23. Brillianteering Polishing of the star & upper and lower half facets
24. Bezel facets are kites
the ones shaped
like
25. star facets are triangles next to table
the ones shaped
like
Study online at https://quizlet.com/_eftpjm
1. Bourse A diamond buying and selling club
- they have them in trading centers
2. Peridotite A type of rock that diamonds form in
- igneous rock ( formed from a molten state)
- most diamond form in this rock
- has consistent release of carbon
3. Eglogite A type of rock that diamond form in
- metamorphic rock (rocks that have been altered by heat and pressure
- does not have a consistent release of carbon
4. How far beneath 90-140 miles (140-220 kilometers)
the earth do dia-
monds form?
5. Drift A horizontal tunnel drilled through a diamond pipe
6. De Beers Consol- the owners of a farm where one of the first diamond rushes took place.
idated Mines Ltd.
was named after
7. The Central Sell- A rough diamond distribution agency
ing Organization - served as this until 2001
(CSO)
8. Pipes The deep vertical formations through which diamonds travel to the surface
9. Chambering An older underground mining technique
- expensive & dangerous so no longer used
- block caving is the alternative to this
10. Most of the dia- pipe, alluvial, and marine deposits
monds that come
, Diamonds & diamond grading final exam
Study online at https://quizlet.com/_eftpjm
from Africa are
recovered from
11. Most of the dia- Primary Sources
monds that come
from Russia are
recovered from
12. What is the spe- 3.52
cific gravity of a
gem-quality dia-
mond?
13. Diamonds are Marine deposits
more concentrat-
ed in which type
of deposit?
14. The first step in look for the oldest parts of the earth's crust
exploring for dia-
monds is to
15. The diamond the world's supply of diamond rough has increased
industry has - this means diamonds are available to more people
changed dramat-
ically in recent
years because
16. The Argyle mine India
in Australia con-
tributed to the
rise of the cutting
industry in
, Diamonds & diamond grading final exam
Study online at https://quizlet.com/_eftpjm
17. What is the soft- Dodecahedral
est crystal direc-
tion in diamond?
18. What crystal sys- Isometric or cubic crystal system
tem does dia-
mond belong to?
19. What are dia- Cubic ( runs horizontal), octahedral (on face), dodecahedral (runs vertical)
mond's 3 internal
crystal planes?
20. The crystal octahedral planes
planes most suit-
able for cleaving
a diamond are
the
21. Another name isometric
for the cubic sys-
tem is
22. Blocker Polishes the crown and pavilion mains
23. Brillianteering Polishing of the star & upper and lower half facets
24. Bezel facets are kites
the ones shaped
like
25. star facets are triangles next to table
the ones shaped
like
