Diamantni slovar
Klíčové pojmy a definice ze světa diamantů
Annealing
Heat treatment applied after irradiation to stabilise or further modify a diamond’s colour.
Izvedi večAsscher Cut
A square step cut with cropped corners, known for its distinctive hall-of-mirrors optical effect.
Izvedi večBaguette
Obdélníkový stupňovitý brus, často používaný jako doplňkový kámen.
Luneta (bezel)
Zasazení, kde kovový proužek obklopuje celý obvod kamene.
Cape Diamond
A diamond with a yellowish tint caused by nitrogen impurities (N3 centre at 415.5 nm).
Izvedi večKatedrální zasazení
Vysoké zasazení s obloukovými rameny připomínajícími katedrálu.
Clarity Characteristics
Internal and external features (inclusions and blemishes) used to determine a diamond’s clarity grade.
Izvedi večCoating
A surface treatment that applies a thin layer to alter a diamond’s apparent colour; not permanent.
Izvedi večCrown Angle
The angle between the bezel (crown main) facets and the girdle plane, influencing the balance of fire and brilliance.
Izvedi večDepth Percentage
The total height of a diamond divided by its average girdle diameter, expressed as a percentage.
Izvedi večDiamond Grading Report
A document issued by a gemological laboratory detailing a diamond’s 4Cs, measurements, and identifying characteristics.
Izvedi večFancy Vivid
The highest colour saturation grade for fancy coloured diamonds, indicating the most intense and pure colour.
Izvedi večFluorescence Grades
The five-point scale used to describe fluorescence intensity: None, Faint, Medium, Strong, and Very Strong.
Izvedi večFracture Filling
A clarity treatment in which a glass-like substance is injected into surface-reaching fractures to reduce their visibility.
Izvedi večFTIR
Fourier-transform infrared spectroscopy, used to classify diamond type (I/II) and detect certain treatments.
Izvedi večHodnocení (grading)
Systematické posouzení kvality diamantu podle standardizovaných kritérií.
Izvedi večHue
The dominant spectral colour of a fancy coloured diamond, such as blue, pink, or yellow.
Izvedi večIrradiation
A treatment using electron or neutron bombardment to alter a diamond’s colour, often followed by annealing.
Izvedi večKarát (zlato)
Míra ryzosti zlata (24 kt = čisté zlato). Nepleťte s karátem diamantu.
Kimberleyský proces
Mezinárodní certifikační systém zabraňující obchodu s konfliktními diamanty.
Izvedi večLaser Drilling
A clarity treatment that uses a focused laser beam to create a channel to reach and bleach dark inclusions.
Izvedi večLaser Inscription
A micro-engraving on the girdle of a diamond, typically the laboratory report number, used for identification.
Izvedi večMeasurements (mm)
The length, width, and depth of a diamond recorded in millimetres on a grading report.
Izvedi večMelee
Drobné diamanty (pod 0,2 ct), často používané jako doplňkové kameny.
Milky Diamond
A diamond with reduced transparency caused by sub-microscopic inclusions or structural irregularities.
Izvedi večOverweight Diamond
A diamond cut deeper than ideal proportions to retain carat weight, resulting in a smaller face-up appearance.
Izvedi večPavilion Angle
The angle between the pavilion main facets and the girdle plane, critical for light return and brilliance.
Izvedi večPhotoluminescence (PL)
A spectroscopic technique using laser excitation to identify defect centres and detect treatments in diamonds.
Izvedi večPlot
A diagram on a grading report that maps the location and type of a diamond’s clarity characteristics.
Izvedi večPolish
The quality of a diamond’s surface smoothness resulting from the cutting and polishing process.
Izvedi večProportions Diagram
A profile view on a grading report showing key angles, percentages, and measurements of a diamond’s cut.
Izvedi večSaturation
The intensity or purity of a fancy diamond’s colour, ranging from weak to vivid.
Izvedi večSpread
The face-up size of a diamond relative to its carat weight; a well-spread stone looks larger for its weight.
Izvedi večStrain Patterns
Internal stress features visible under cross-polarised light; their character differs between natural and lab-grown diamonds.
Izvedi večTable Percentage
The width of the table facet divided by the average girdle diameter, expressed as a percentage.
Izvedi večNapínací zasazení
Kámen držený tlakem kovových ramen — zdánlivě se vznáší.
Tone
The lightness or darkness of a fancy coloured diamond’s colour, ranging from very light to very dark.
Izvedi večType I / Type II
Scientific classification of diamonds based on nitrogen content and arrangement; Type I contains nitrogen, Type II is virtually nitrogen-free.
Izvedi večUV-Vis-NIR
Ultraviolet-visible-near infrared spectroscopy, used to analyse colour origin and detect treatments in diamonds.
Izvedi večVVS čistota
Very Very Slightly Included — minimální inkluze, obtížně viditelné pod 10× lupou.
Izvedi več