GIA Diamond Essentials assignment 1 Questions
and Correct Answers, With Complete Verified Solution.
2024.
diamond uniqueness
only gem made of a single element (carbon); characteristic chemical composition and
crystal structure make it a unique member of the mineral kingdom; formation under high
temperature and pressure conditions (graphite is also carbon only but forms under a
very different condition so it's very soft)
value factors
Features used to judge the quality and value of all gemstones.
The four C's of diamonds
clarity, color, cut, carat; describe a finished diamond's quality; Ancient India used clarity,
color and carat to grade diamonds over 2000 yrs ago.
trace elements
atoms of chemical elements other than carbon caused fancy-colored diamonds; the
0.005 percent not carbon can include one or more trace elements.
Inclusion
clarity characteristic totally enclosed in a polished gemstone or extending into it from the
surface
blemish
Clarity characteristic that's confined to the surface of a polished gemstone.
Clarity characteristics
The collective term for inclusions and blemishes.
Lab-grown gem
A manmade (synthetic) gem with essentially the same chemical composition, crystal
structure, and optical and physical properties as the natural gem material.
Simulants/imitations/substitute
materials that simply look like natural gems; can be either natural or man-made
Diamond simulants
Any material that is not diamond or synthetic diamond, but which imitates a diamond's
appearance and is used in its place.
- glass
- zircon 锆石
- colorless lab-grown spinel 培育无色尖晶石
- YAG yttrium aluminum garnet 钇铝石榴
- GGG gadolinium gallium garnet 钇镓石榴
- CZ synthetic cubic zirconia 立方氧化锆
FTC Guidlines
first guideline: trade practice rules for the jewelry industry 1957; new version: guides for
the jewelry, precious metals, and pewter industries 2018.
cut affects...
and Correct Answers, With Complete Verified Solution.
2024.
diamond uniqueness
only gem made of a single element (carbon); characteristic chemical composition and
crystal structure make it a unique member of the mineral kingdom; formation under high
temperature and pressure conditions (graphite is also carbon only but forms under a
very different condition so it's very soft)
value factors
Features used to judge the quality and value of all gemstones.
The four C's of diamonds
clarity, color, cut, carat; describe a finished diamond's quality; Ancient India used clarity,
color and carat to grade diamonds over 2000 yrs ago.
trace elements
atoms of chemical elements other than carbon caused fancy-colored diamonds; the
0.005 percent not carbon can include one or more trace elements.
Inclusion
clarity characteristic totally enclosed in a polished gemstone or extending into it from the
surface
blemish
Clarity characteristic that's confined to the surface of a polished gemstone.
Clarity characteristics
The collective term for inclusions and blemishes.
Lab-grown gem
A manmade (synthetic) gem with essentially the same chemical composition, crystal
structure, and optical and physical properties as the natural gem material.
Simulants/imitations/substitute
materials that simply look like natural gems; can be either natural or man-made
Diamond simulants
Any material that is not diamond or synthetic diamond, but which imitates a diamond's
appearance and is used in its place.
- glass
- zircon 锆石
- colorless lab-grown spinel 培育无色尖晶石
- YAG yttrium aluminum garnet 钇铝石榴
- GGG gadolinium gallium garnet 钇镓石榴
- CZ synthetic cubic zirconia 立方氧化锆
FTC Guidlines
first guideline: trade practice rules for the jewelry industry 1957; new version: guides for
the jewelry, precious metals, and pewter industries 2018.
cut affects...
