GIA Diamond Essentials Final Exam - Questions with Verified Answers

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GIA Diamond Essentials Final Exam - Questions with Verified Answers The combination of the Four C's relates primarily to Value The metric carat equals 0.200 gram The small, flat, polished surfaces o ... n a finished diamond are called Facets Most diamonds used in jewelry are Nearly colorless to very light yellow or light brown Diamond is composed primarily of Carbon Gem shapes and cutting styles other than the standard round brilliant are called Fancy cuts Clarity characteristics confined to the surface of a polished diamond are called Blemishes The term "point" in reference to weight is equal to 0.01 A gemstone's resistance to scratching is known as its Hardness On average, mine workers must process more than a ton of rock to recover A half carat of diamonds The flashes of color you see in a polished diamond are called Fire A standard round brilliant-cut diamond has 57 or 58 facets The term brilliant cut is used for gemstones with facets that Are mostly triangular or kite-shaped Compared to blemishes, inclusions normally have More impact on a diamond's value The three major parts of a polished diamond are crown, pavilion, and Girdle Fracture filling can dramatically affect a diamond's Apparent clarity An included diamond crystal that reaches the surface of a cut diamond is called a Knot The most convenient and inexpensive magnifier adequate for diamond grading is the Loupe Which of the following is a result of the bruting process? Bearding A diamond with "noticeable inclusions at 10X would receive which of the following clarity grades? SI1 or SI2 You should tell your customers that the SI designation means Slightly included A detailed map of a diamond, showing its clarity characteristics, is called a Plot A diamond that's graded Flawless might still have Extra facets on the pavilion not visible face up The general term for clarity characteristics within a diamond is Inclusions When part of the rough crystal's original surface is left on a fashioned diamond, it's called a Natural One of the five factors that determine the overall effect of inclusions on clarity is Nature The standard magnification used for clarity grading is 10X In describing inclusions to customers, which of the following terms would probably be best to use? Clarity characteristics The general term for any break in a diamond is Feather Clarity characteristics limited to the surface of a diamond are called Blemishes To color grade a light yellow or brown diamond, graders compare it to a masterstone for Tone & saturation Which of the following GIA color grades indicates the greatest amount of yellow? H The most common color of fluorescence in gem-quality diamond is Blue Each letter grade in the GIA Color Scale represents A range of color On the GIA color scale, the top grade in the normal color range is D The most commonly encountered colors among colored diamonds are Brown and yellow The normal color range of diamonds is Colorless to light yellow, brown, and gray Which of the diamond colors listed here are the most rare? Red & purple Most consumers can easily see color beyond M Irradiated diamonds might change color when exposed to Heat Which masterstone does the GIA Laboratory use to determine the point where a yellow diamond transitions to the colored diamond grading scale? Z The combination of tone & saturation that determines how noticeable a color is, is known as Depth of color The price differences between colorless diamonds and near-colorless diamonds are due primarily to Rarity When mounted, G, H, and I color diamonds can look Colorless face-up The annealing of irradiated diamonds to stabilize their color is done by Heating An unattractive gray ring under the table may be present in diamonds with Deep pavilions The balance of a finished gem's cut is known as its Symmetry On fancy shapes such as the oval or pear, variations in the pavilion might cause Bow-ties The pavilion angel is the angle formed by the girdle plane and the Pavilion main facets Pavilion depth percentage is expressed as a percentage of the Average girdle diameter The quality of the polish and precision of the cut of a fashioned gemstone is its Finish If a marquise cut measures 9mm X 3mm, its length-to-width ration is 3:1 The sparkle that occurs in a diamond when the gem, its light source, or its observer move is known as Scintillation The primary purpose of the culet is to Prevent chipping The separation of white light into its spectral colors is Dispersion A diamond's finish consists of symmetry and Polish The crown angle is formed by the girdle plane and the Bezel facets Symmetry variations include Off-center tables and misshapen facets [Show More]

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