Exam (elaborations)
GIA Colored Stones Exam terms exam questions and answers.
- Course
- Institution
GIA Colored Stones Exam terms exam questions and answers.
[Show more]
Content preview
GIA Colored StonesExam terms exam
questions and answers
A natural, inorganic substance with a characteristic
chemical composition and usually characteristic
structure. - answer Mineral
A cutting style that combines brilliant-cut and step
cut facets. - answer Mixed cut
Tiny nicks and pits caused by wear and damage to
a gem's facet edges or culet. - answer Abrasions
A pattern of dark vertical lines or bands shown by
certain gems when viewed through a spectroscope.
- answer Absorption spectrum
The cloudy bluish white light in a moonstone,
caused by scattering of light. - answer
Adularescence
,Chalcedony with a curved or angular bands or
layers that differ in color and transparency . -
answer Agate
A mass of tiny, randomly oriented crystals. -
answer Aggregate
Common name for the Pinctada fucata oyster and
the natural or cultured pearls it produces. - answer
Akoya
A gem colored by trace elements in its crystal
structure. - answer Allochromatic
A deposit where gems are eroded from their source
rock, then transported away from their source and
further concentrated. - answer Alluvial deposit
Lacking a regular crystal structure. - answer
Amorphous
A crystalized form of calcium carbonate found in
nacre. - answer Aragonite
Two or more separate pieces of material joined to
form a unit. - answer Assembled stone
,Crossing of chatoyant bands, creating a star in the
dome of cabochon. - answer Asterism
The basic structural unit of all matter. - answer
Atom
A glittery effect caused by light reflecting from
small, flat inclusions within a gemstone. - answer
Aventurescence
An opal's bodycolor, independent of its play-of-
color. - answer Background color
A bead used as the core of a cultured pearl, usually
made from a freshwater mussel shell. - answer
Bead nucleus
A treatment that uses chemicals to lighten or
remove color. - answer Bleaching
Characteristic or irregularity confined to the
surface of a polished gemstone. - answer Blemish
, Trade term for a highly prized, vivid blue
adularescence displayed by the finest moonstone. -
answer Blue Sheen
A gemstone's basic color, determined by its
selective absorption of light. - answer Bodycolor
A crystal growth habit with a bumpy appearance
similar to a bunch of grapes. - answer Botryoidal
Thin layers of precious opal, cut to include matrix. -
answer Boulder opal
A cylindrical synthetic crystal produced by the
flame-fusion process. - answer Boule
Light that eventually returns to the eye after
entering a gem through the crown, reflecting off its
pavilion facets, and exiting back through the
crown. - answer Brilliance
Cutting style with triangular or kite-shaped facets
that radiate from the center toward girdle. -
answer Brilliant cut
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 GUARANTEEDSUCCESS. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $15.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67866 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now