Dimantu vārdnīca
Galvenie termini un definīcijas no dimantu pasaules
Annealing
Heat treatment applied after irradiation to stabilise or further modify a diamond’s colour.
Uzzināt vairākAsscher Cut
A square step cut with cropped corners, known for its distinctive hall-of-mirrors optical effect.
Uzzināt vairākBaguette
A rectangular step cut, often used as an accent stone.
Bezel Setting
A setting where a metal rim surrounds the entire perimeter of the stone.
Brilliance
White light reflected from the upper facets of a diamond back to the observer.
Uzzināt vairākCape Diamond
A diamond with a yellowish tint caused by nitrogen impurities (N3 centre at 415.5 nm).
Uzzināt vairākCathedral Setting
A raised setting with arched shoulders resembling a cathedral.
Clarity Characteristics
Internal and external features (inclusions and blemishes) used to determine a diamond’s clarity grade.
Uzzināt vairākCoating
A surface treatment that applies a thin layer to alter a diamond’s apparent colour; not permanent.
Uzzināt vairākCrown
The upper portion of a diamond above the girdle — contains the table and crown facets.
Uzzināt vairākCrown Angle
The angle between the bezel (crown main) facets and the girdle plane, influencing the balance of fire and brilliance.
Uzzināt vairākDepth Percentage
The total height of a diamond divided by its average girdle diameter, expressed as a percentage.
Uzzināt vairākDiamond Grading Report
A document issued by a gemological laboratory detailing a diamond’s 4Cs, measurements, and identifying characteristics.
Uzzināt vairākDispersion
The splitting of white light into a rainbow spectrum — a diamond’s "fire."
Uzzināt vairākFancy Vivid
The highest colour saturation grade for fancy coloured diamonds, indicating the most intense and pure colour.
Uzzināt vairākFluorescence Grades
The five-point scale used to describe fluorescence intensity: None, Faint, Medium, Strong, and Very Strong.
Uzzināt vairākFracture Filling
A clarity treatment in which a glass-like substance is injected into surface-reaching fractures to reduce their visibility.
Uzzināt vairākFTIR
Fourier-transform infrared spectroscopy, used to classify diamond type (I/II) and detect certain treatments.
Uzzināt vairākGirdle
The widest circumference of a diamond — the boundary between crown and pavilion.
Uzzināt vairākHue
The dominant spectral colour of a fancy coloured diamond, such as blue, pink, or yellow.
Uzzināt vairākIrradiation
A treatment using electron or neutron bombardment to alter a diamond’s colour, often followed by annealing.
Uzzināt vairākKarat (Gold)
A measure of gold purity (24kt = pure gold). Not to be confused with diamond carat.
Kimberley Process
International certification system preventing the trade of conflict diamonds.
Uzzināt vairākLaser Drilling
A clarity treatment that uses a focused laser beam to create a channel to reach and bleach dark inclusions.
Uzzināt vairākLaser Inscription
A micro-engraving on the girdle of a diamond, typically the laboratory report number, used for identification.
Uzzināt vairākMeasurements (mm)
The length, width, and depth of a diamond recorded in millimetres on a grading report.
Uzzināt vairākMelee
Small diamonds (under 0.2 ct), often used as accent stones.
Milky Diamond
A diamond with reduced transparency caused by sub-microscopic inclusions or structural irregularities.
Uzzināt vairākNatural Diamond
A diamond formed by natural geological processes in the Earth’s mantle.
Uzzināt vairākOverweight Diamond
A diamond cut deeper than ideal proportions to retain carat weight, resulting in a smaller face-up appearance.
Uzzināt vairākPavilion
The lower part of a diamond below the girdle — reflects light back through the crown.
Uzzināt vairākPavilion Angle
The angle between the pavilion main facets and the girdle plane, critical for light return and brilliance.
Uzzināt vairākPhotoluminescence (PL)
A spectroscopic technique using laser excitation to identify defect centres and detect treatments in diamonds.
Uzzināt vairākPlot
A diagram on a grading report that maps the location and type of a diamond’s clarity characteristics.
Uzzināt vairākPolish
The quality of a diamond’s surface smoothness resulting from the cutting and polishing process.
Uzzināt vairākProportions Diagram
A profile view on a grading report showing key angles, percentages, and measurements of a diamond’s cut.
Uzzināt vairākSaturation
The intensity or purity of a fancy diamond’s colour, ranging from weak to vivid.
Uzzināt vairākSpread
The face-up size of a diamond relative to its carat weight; a well-spread stone looks larger for its weight.
Uzzināt vairākStrain Patterns
Internal stress features visible under cross-polarised light; their character differs between natural and lab-grown diamonds.
Uzzināt vairākTable Percentage
The width of the table facet divided by the average girdle diameter, expressed as a percentage.
Uzzināt vairākTension Setting
A stone held by the pressure of metal arms — appears to float.
Tone
The lightness or darkness of a fancy coloured diamond’s colour, ranging from very light to very dark.
Uzzināt vairākType I / Type II
Scientific classification of diamonds based on nitrogen content and arrangement; Type I contains nitrogen, Type II is virtually nitrogen-free.
Uzzināt vairākUV-Vis-NIR
Ultraviolet-visible-near infrared spectroscopy, used to analyse colour origin and detect treatments in diamonds.
Uzzināt vairākVS Clarity
Very Slightly Included — minor inclusions visible only under magnification.
Uzzināt vairākVVS Clarity
Very Very Slightly Included — minimal inclusions, difficult to see under 10× loupe.
Uzzināt vairākWindow Effect
A dark area in the center of a poorly cut stone where light "leaks" through.
Uzzināt vairāk