Terms in this set (25) Which type of inclusion might have its appearance altered by treatment?
The diamond’s face-up view
. Which factor normally counts most in setting a diamond’s clarity grade?
Which clarity characteristic can occur when loose diamonds?
Abrasions
can occur when loose diamonds rub against each other in a parcel.
Which factor normally counts most in setting a diamonds clarity grade?
The face-up view
normally counts most in setting the grade because that’s how the diamond is seen when it’s set in jewelry. In most cases you should tell the customer the diamond’s clarity grade and explain it.
Which treatment can remove some or all color from certain types of light brown diamonds?
High-pressure high-temperature (HPHT)
– This treatment alters a diamond’s color at the molecular level. The original method removes some or all color from certain types of light brown diamonds.
How precisely opposite sides of the diamond match is considered when judging?
The main
concern with symmetry
is how precisely opposite sides of the diamond match. This is judged from different views – crown, pavilion, and profile. Another consideration is the pre- cision of facet shape and placement.
How do you read GIA clarity characteristics?
- Flawless (FL): No visible inclusions or blemishes.
- Internally Flawless (IF): No inclusions are visible, but blemishes can be seen under 10x magnification.
- Very, Very Slightly Included (VVS1 and VVS2): Inclusions are very difficult to see.
What is GIA clarity characteristics?
Clarity: General Knowledge Recap
Clarity means
the flaws of the diamonds that occur naturally, there are external flaws (blemishes) and internal flaws (inclusions)
. These flaws are called “Clarity Characteristics” in the GIA Diamond Report. In simpler terms, they are the type of flaws a diamond has.
What are the worst inclusions in a diamond?
- The 4 Worst Inclusions. …
- 1) Black Carbon Spots. …
- Not all Carbon is Bad… …
- Point is, stay away from Black Spots! …
- 2) Inclusions Top, Center of your Diamond. …
- 3) Long Cracks or Fractures. …
- 4) Chips on the Side of the Diamond. …
- Girdle Chips.
Is SI1 clarity good?
For most shapes,
an SI1 clarity diamond will be an excellent choice
. However, emerald and asscher-cut diamonds make clarity features much more visible. We recommend choosing a VS clarity diamond for these shapes. Emerald-cut diamonds, like this one, act like a series of mirrors reflecting flaws throughout the stone.
What is the highest possible clarity grade?
FL (or Flawless)
is the highest grade for clarity. An FL diamond has no imperfections even when magnified 10x by a professional. For color, D or completely colorless diamond is the highest grade. While flawless and colorless diamonds are extremely rare, cut determines a diamond’s true value.
Are treated diamonds worth less?
But, what is an enhanced diamond and should you buy one? … Enhanced diamonds are
heavily
included, or low-color diamonds that have been treated to improve their color or clarity. They sell for a much lower price than a mined diamond with equivalent specifications.
What is the most common habit for diamonds?
| Diamond | Crystal habit Octahedral | Twinning Spinel law common (yielding “macle”) | Cleavage 111 (perfect in four directions) | Fracture Irregular/Uneven |
|---|
What does a real black diamond look like?
In fact, the actual body color of a natural black diamond may range from
near-colorless to brown or “olive” green
. Natural-color black diamonds typically are completely opaque, with a high luster that gives the stones an almost metallic appearance. … They are often more affordable than other diamonds, too.
What happens if a diamond is cut too deep?
When a diamond is cut too deep,
light hits the pavilion at a sharper angle, causing it to immediately reflect to another pavilion
. The light is forced to retract and pass through the bottom of the diamond. As this happens, light is dulled and the diamond becomes less vibrant and radiant.
What causes diamonds to look different?
One of the most common reasons why a diamond appears to be darker under direct sunlight is
due to the diamond’s light performance
which is related to the Cut Quality of the diamond. … However, the brightness of a diamond has little to do with the diamond’s colour or clarity grade.
How long does it usually take to divide a 1 carat using a mechanical diamond saw?
Sawing can divide a diamond crystal in directions that yield the best weight retention and shape. In most cutting factories, the saws are set up in rows; so one sawyer can work on many diamonds at the same time. A 1-carat crystal typically takes from
4–6 hours
to saw through.
