GIA Diamonds and Diamond Grading Exam {1513 Questions & Answers 2025 }TESTBANK
4 views 0 purchase
Course
Gia diamonds and diamond
Institution
Gia Diamonds And Diamond
GIA Diamonds and Diamond Grading Exam {1513 Questions
& Answers 2025 }TESTBANK
Aggregate - CORRECT ANSWER a solid mass of individual, randomly oriented
crystals, intergrown or held together by a natural binding agent
Cleavage plane - CORRECT ANSWER plane parallel to a possible crystal face, ...
GIA Diamonds and Diamond Grading Exam {1513 Questions
& Answers 2025 }TESTBANK
Aggregate - CORRECT ANSWER a solid mass of individual, randomly oriented
crystals, intergrown or held together by a natural binding agent
Cleavage plane - CORRECT ANSWER plane parallel to a possible crystal face,
where a diamond can split cleanly when struck
covalent bond - CORRECT ANSWER a chemical bond formed by two atoms sharing
electrons
crystal - CORRECT ANSWER solid matter with atoms arranged in a regular,
repeating pattern
crystalline - CORRECT ANSWER composed of crystals or related to crystals
crystal planes - CORRECT ANSWER internal directions parallel to a mineral's unit
cell surfaces
crystal shape (form) - CORRECT ANSWER geometric shape of a well-formed
crystal
crystal structure (lattice) - CORRECT ANSWER regular, repeating arrangement of
atoms in a mineral
crystal systems - CORRECT ANSWER categories of crystals based on their
symmetry and internal structure
doubling - CORRECT ANSWER the appearance of double images of a gemstone's
facet junctions on the side opposite the viewer
doubly refractive (anisotropic) - CORRECT ANSWER possessing different physical
or optical properties in different crystal directions
glassie - CORRECT ANSWER a well-shaped, transparent, octahedral diamond
crystal with sharp, square edges
,glide plane - CORRECT ANSWER crystal distortion caused during growth when
one part of the lattice is offset in relation to the rest
graining (grain lines) - CORRECT ANSWER visible, shadow-like lines in a diamond
caused by irregularities in the crystal structure
Beneficiation - CORRECT ANSWER A commitment to reserve a portion of the
resources derived from any country for the economic development of that
country.
Blemish - CORRECT ANSWER Clarity characteristic that's confined to the surface
of a polished gemstone. Characteristic or irregularity confined to the surface of a
polished gemstone.
Blockchain - CORRECT ANSWER A shared, unalterable ledger used to record
transactions and track assets through a supply chain or business network.
Blocking - CORRECT ANSWER Placing the first 17 or 18 facets on a diamond,
including the crown and pavilion main facets, table, and sometimes a culet.
Bort - CORRECT ANSWER A form of industrial-grade diamond that usually occurs
as very included single crystals in a range of yellows, grays, and browns.
Bow-tie - CORRECT ANSWER A dark area across the center of an elongated
brilliant cut.
Brightfield illumination - CORRECT ANSWER Lighting a diamondfrom below to
create a bright background.
Brightness - CORRECT ANSWER The effect of all the diamond's internal and
external reflections of white light.
Brilliant cut - CORRECT ANSWER Cutting style with triangular or kite-shaped
facets that radiate from the center toward the girdle.
Brillianteering - CORRECT ANSWER Placement and polishing of the star and upper
and lower girdle facets.
Bruting - CORRECT ANSWER Forming the basic face-up outline of a round or
rounded shape diamond to prepare it for faceting.
Bulk sampling - CORRECT ANSWER Large-scale character sampling.
,Carbonado - CORRECT ANSWER An aggregate of many randomly oriented
interlocking tiny diamond crystals that is the toughest form of diamond.
Carbonate - CORRECT ANSWER A class of chemical compounds that contain
carbon and oxygen.
Catalyst - CORRECT ANSWER A substance that increases the rate of a chemical
reaction.
Cave mining - CORRECT ANSWER An underground mining technique in which
orebody is drilled beneath the surface, loosened, and collected as it falls.
Central Selling Organisation (CSO) - CORRECT ANSWER An agency designed to
purchase, sort, evaluate, and sell rough diamonds.
Character sampling - CORRECT ANSWER Testing for the size, shape, clarity, and
color of the diamonds in a deposit.
Characteristic color - CORRECT ANSWER The basic face-up color of a colored
diamond.
Clarity characteristic - CORRECT ANSWER Internal or external feature of a
gemstone that helps determine its quality.
Cleavage - CORRECT ANSWER A smooth, flat break in a gemstone parallel to
planes of atomic weakness.
Cleavage plane - CORRECT ANSWER Plane parallel to a possible crystal face,
where a diamond can split cleanly when struck.
Cleaving - CORRECT ANSWER Dividing a diamond into two or more pieces along a
cleavage plane.
Color center - CORRECT ANSWER A small defect in the atomic structure of a
material that can absorb light and give rise to a color. Structural defect that
influences an object's absorption of light and can cause its color.
Color lamellae - CORRECT ANSWER Closely spaced grain lines where color
concentrates.
, Coning - CORRECT ANSWER The process of forming the pavilion angle by
gradually polishing off the extra material at different angles.
Consignment - CORRECT ANSWER A selection of goods loaned to a dealer by
another wholesaler or a gem cutter.
Core - CORRECT ANSWER Earth's innermost layer.
Cost-plus model - CORRECT ANSWER Model in which final sale price is based on
the cost to produce the product plus a small markup.
Covalent bond - CORRECT ANSWER A chemical bond formed by two atoms
sharing electrons.
Craftsmanship - CORRECT ANSWER The care that goes into the fashioning of a
polished diamond, as confirmed by its finish.
Cratons - CORRECT ANSWER Ancient, large, and stable parts of the earth's
continental crust.
Critical angle - CORRECT ANSWER Angle between the normal and the maximum
angle of refraction, which is the largest angle at which rays inside the diamond
can escape.
Crossed polarizers - CORRECT ANSWER Two polarizers with their light-
transmitting directions aligned perpendicularly so light cannot transmit through
them.
Crown angle - CORRECT ANSWER The angle formed by the bezel facets and the
girdle plane.
Crown height percentage - CORRECT ANSWER The distance from the girdle plane
to the table, expressed as a percentage of average girdle diameter.
Crust - CORRECT ANSWER The surface and outermost layer of the earth.
Crustal diamond - CORRECT ANSWER Rare diamond that forms in the continental
crust or near the earth's surface due to meteorite impact or tectonic plate
collision.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller GEO888. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $22.49. You're not tied to anything after your purchase.
