Diamond Terms Not Everyone Knows About
Key Takeaways
- Diamonds are not only high-value jewelry items but also a field with a very strict system of standards and concepts. To understand and choose the right diamond, buyers need to clearly grasp...
Diamonds are not only high-value jewelry items but also a field with a very strict system of standards and concepts. To understand and choose the right diamond, buyers need to clearly grasp the important diamond terms used in grading, buying and selling, and valuation.
In this article, Jemmia will compile the most common diamond terms in full, from the 4C standards, shapes, structure, and light effects to certifications and commercial concepts, helping you gain a comprehensive and accurate understanding.
Why is it necessary to understand all diamond terms?
Diamond terminology is a set of professional concepts used to describe:
- Diamond quality
- Physical and optical characteristics
- Diamond value and classification methods
These terms are used consistently worldwide, especially in international diamond certifications such as GIA, IGI, and HRD. Understanding diamond terminology helps buyers:
- Correctly assess the value of a diamond
- Compare different options
- Avoid confusion during consultation or transactions
Diamond terminology is professional concepts used to describe
Diamond terminology according to the 4C standard
1. Carat
Carat is the unit used to measure a diamond's weight, in which 1 carat equals 0.2 grams. The larger the carat, the rarer and more valuable the diamond, but it does not entirely determine beauty.
Point is a smaller unit of carat, with 1 carat equal to 100 points. This term is commonly used for diamonds with small weight.
2. Color
Color is the term indicating the level of colorlessness in white diamonds. The less color a diamond has, the rarer and more valuable it is.
3. Clarity
Clarity reflects the purity level of a diamond based on the number, size, and position of inclusions. The higher the clarity, the more transparent the diamond.
4. Cut
Cut is the cutting quality of a diamond, determining its ability to reflect light. This is the factor that most strongly affects a diamond's brilliance.
Diamond terminology according to the 4C standard
Diamond shape terminology (Shape)
5. Shape
Shape is the external form of a diamond after cutting. Shape affects style and aesthetic perception.
6. Round Brilliant
The round shape is the most popular shape and has the best light reflection ability. This is a popular choice for diamond rings.
7. Princess
Square or rectangular shape, with a modern style. Princess cut has brilliance second only to round.
8.Cushion
A square shape with rounded corners, carrying a classic look. Cushion cut creates a soft and luxurious feel.
9. Oval
The oval shape makes the diamond appear larger than its actual weight. Suitable for those who like an elegant silhouette.
Diamond shape terminology (Shape)
Diamond structure terminology
10. Table
Table is the largest flat surface on the top of a diamond. The table ratio affects the ability to gather and reflect light.
11. Depth
Depth is the overall depth of a diamond expressed as a percentage. Proper depth helps the diamond appear bright and well-proportioned.
12. Crown
Crown is the upper part of the diamond, located between the table and the girdle. The crown affects fire.
13. Pavilion
Pavilion is the lower part of the diamond. This is the area that reflects light back to the viewer's eye.
14. Girdle
Girdle is the edge surrounding the diamond. A girdle that is too thin or too thick affects both durability and aesthetics.
15. Culet
Culet is the bottom point of a diamond. A culet that is too large can cause light leakage.
Diamond structure terminology
Light effect terminology
16. Brilliance
Brilliance is the white light reflected from a diamond. This is the factor that creates the “brightness” of the stone.
17. Fire
Fire is the colorful flash produced when light is dispersed. Fire makes diamonds more radiant and vivid.
18. Scintillation
Scintillation is the sparkling light effect when a diamond moves. This effect depends on the cut.
Light effect terminology
Fluorescence terminology
19. Fluorescence
Fluorescence is the phenomenon of a diamond glowing under UV rays. Some fluorescence levels can affect color when viewed outdoors.
20. UV (Ultraviolet Light)
UV is ultraviolet light found in sunlight and specialized lamps. Fluorescence only appears when the diamond is exposed to a UV light source.
21. Fluorescence Effect
Fluorescence Effect is the term indicating the impact of fluorescence on a diamond's appearance. This impact depends on the fluorescence intensity and color grade.
22. Milky Appearance
Milky is the phenomenon in which a diamond looks cloudy due to strong fluorescence. This is a factor that reduces diamond quality and value.
Fluorescence terminology
Diamond certification terminology
23. GIA
GIA is the most reputable diamond grading organization in the world. A GIA certificate is considered the gold standard of the industry.
24. IGI
IGI is a popular grading organization in Asia and Europe. It is often used for jewelry diamonds and lab-grown diamonds.
25. Diamond Certificate
Diamond Certificate is a certificate that fully describes the characteristics of a diamond. This is the basis for determining value and quality.
Diamond certification terminology
See more in the diamond price list with promotional prices at Jemmia or contact 0838 353 333 for consultation.
Diamond classification terminology
26. Natural Diamond
Natural diamonds are formed deep within the earth over billions of years. They have high value and natural rarity.
27. Lab-grown Diamond
Diamonds created in a laboratory with the same physical and chemical structure as natural diamonds. Lower in price and environmentally friendly.
See more: What Is a Natural Diamond? Its Meaning and Value?
Diamond classification terminology
Jewelry application terminology
28. Solitaire
Solitaire is a jewelry style that uses only one main diamond. A minimalist and luxurious style.
29. Halo
Halo is a design style in which the main diamond is surrounded by small diamonds. It makes the center stone appear larger and more prominent.
30. Setting
Setting is the method of mounting a diamond onto jewelry. Setting affects safety and overall aesthetics.
Jewelry application terminology
Understanding each diamond term helps buyers correctly evaluate the quality, value, and beauty of diamonds. This is essential foundational knowledge if you want to buy, sell, advise on, or invest in diamonds professionally.
