Γλωσσάρι διαμαντιών
Βασικοί όροι και ορισμοί από τον κόσμο των διαμαντιών
Annealing
Heat treatment applied after irradiation to stabilise or further modify a diamond’s colour.
Μάθετε περισσότεραAsscher Cut
A square step cut with cropped corners, known for its distinctive hall-of-mirrors optical effect.
Μάθετε περισσότεραBaguette
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.
Λαμπρότητα
White light reflected from the upper facets of a diamond back to the observer.
Μάθετε περισσότεραCape Diamond
A diamond with a yellowish tint caused by nitrogen impurities (N3 centre at 415.5 nm).
Μάθετε περισσότεραΆνθρακας
The chemical element that diamonds are composed of (99.95% pure carbon).
Μάθετε περισσότεραCathedral Setting
A raised setting with arched shoulders resembling a cathedral.
Καθαρότητα
The degree of internal (inclusions) and external (blemishes) imperfections.
Μάθετε περισσότεραClarity Characteristics
Internal and external features (inclusions and blemishes) used to determine a diamond’s clarity grade.
Μάθετε περισσότεραCoating
A surface treatment that applies a thin layer to alter a diamond’s apparent colour; not permanent.
Μάθετε περισσότεραΣτέμμα
The upper portion of a diamond above the girdle — contains the table and crown facets.
Μάθετε περισσότεραCrown Angle
The angle between the bezel (crown main) facets and the girdle plane, influencing the balance of fire and brilliance.
Μάθετε περισσότεραDepth Percentage
The total height of a diamond divided by its average girdle diameter, expressed as a percentage.
Μάθετε περισσότεραDiamond Grading Report
A document issued by a gemological laboratory detailing a diamond’s 4Cs, measurements, and identifying characteristics.
Μάθετε περισσότεραΔιασπορά
The splitting of white light into a rainbow spectrum — a diamond’s "fire."
Μάθετε περισσότεραFancy Vivid
The highest colour saturation grade for fancy coloured diamonds, indicating the most intense and pure colour.
Μάθετε περισσότεραFluorescence Grades
The five-point scale used to describe fluorescence intensity: None, Faint, Medium, Strong, and Very Strong.
Μάθετε περισσότεραFour Cs (4C)
Color, Clarity, Cut, and Carat — the universal diamond quality factors.
Μάθετε περισσότεραFracture Filling
A clarity treatment in which a glass-like substance is injected into surface-reaching fractures to reduce their visibility.
Μάθετε περισσότεραFTIR
Fourier-transform infrared spectroscopy, used to classify diamond type (I/II) and detect certain treatments.
Μάθετε περισσότεραGIA
Gemological Institute of America — the world’s leading gemological laboratory.
Μάθετε περισσότεραΡουντίστα
The widest circumference of a diamond — the boundary between crown and pavilion.
Μάθετε περισσότεραGrading
Systematic assessment of diamond quality according to standardized criteria.
Μάθετε περισσότεραHPHT
High Pressure High Temperature — a method for treating and creating diamonds.
Μάθετε περισσότεραHue
The dominant spectral colour of a fancy coloured diamond, such as blue, pink, or yellow.
Μάθετε περισσότεραIrradiation
A treatment using electron or neutron bombardment to alter a diamond’s colour, often followed by annealing.
Μάθετε περισσότεραKarat (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.
Μάθετε περισσότεραLaser Drilling
A clarity treatment that uses a focused laser beam to create a channel to reach and bleach dark inclusions.
Μάθετε περισσότεραLaser Inscription
A micro-engraving on the girdle of a diamond, typically the laboratory report number, used for identification.
Μάθετε περισσότεραMeasurements (mm)
The length, width, and depth of a diamond recorded in millimetres on a grading report.
Μάθετε περισσότεραMelee
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.
Μάθετε περισσότεραNatural Diamond
A diamond formed by natural geological processes in the Earth’s mantle.
Μάθετε περισσότεραOverweight Diamond
A diamond cut deeper than ideal proportions to retain carat weight, resulting in a smaller face-up appearance.
Μάθετε περισσότεραΠερίπτερο
The lower part of a diamond below the girdle — reflects light back through the crown.
Μάθετε περισσότεραPavilion Angle
The angle between the pavilion main facets and the girdle plane, critical for light return and brilliance.
Μάθετε περισσότεραPhotoluminescence (PL)
A spectroscopic technique using laser excitation to identify defect centres and detect treatments in diamonds.
Μάθετε περισσότεραPlot
A diagram on a grading report that maps the location and type of a diamond’s clarity characteristics.
Μάθετε περισσότεραPolish
The quality of a diamond’s surface smoothness resulting from the cutting and polishing process.
Μάθετε περισσότεραProportions Diagram
A profile view on a grading report showing key angles, percentages, and measurements of a diamond’s cut.
Μάθετε περισσότεραSaturation
The intensity or purity of a fancy diamond’s colour, ranging from weak to vivid.
Μάθετε περισσότεραSolitaire
A jewel with a single center stone — the classic engagement ring style.
Μάθετε περισσότεραSpread
The face-up size of a diamond relative to its carat weight; a well-spread stone looks larger for its weight.
Μάθετε περισσότεραStrain Patterns
Internal stress features visible under cross-polarised light; their character differs between natural and lab-grown diamonds.
Μάθετε περισσότεραTable Percentage
The width of the table facet divided by the average girdle diameter, expressed as a percentage.
Μάθετε περισσότεραTension 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.
Μάθετε περισσότεραType I / Type II
Scientific classification of diamonds based on nitrogen content and arrangement; Type I contains nitrogen, Type II is virtually nitrogen-free.
Μάθετε περισσότεραUV-Vis-NIR
Ultraviolet-visible-near infrared spectroscopy, used to analyse colour origin and detect treatments in diamonds.
Μάθετε περισσότεραVS Clarity
Very Slightly Included — minor inclusions visible only under magnification.
Μάθετε περισσότεραVVS Clarity
Very Very Slightly Included — minimal inclusions, difficult to see under 10× loupe.
Μάθετε περισσότεραWindow Effect
A dark area in the center of a poorly cut stone where light "leaks" through.
Μάθετε περισσότερα