Black Diamonds Buying Guide | Everything You Need to Know
2016年10月11日 · Black Diamonds: What You Need to Know. Published October 11, 2016. From cast-asides to starring roles, black diamonds have taken quite a journey. They’re even vying for position as center stones in engagement rings! But it pays to look beyond their unique appearance to learn more about this enigmatic gem.
Understanding the 4Cs of Diamond Quality | Diamond Factors
GIA’s 4Cs transformed the way diamond quality is determined and communicated, forever changing how diamonds are evaluated, bought and sold. The 4Cs are for everyone. This framework is both a way to better understand your diamond, and to ensure accuracy in the evaluation of your diamond’s unique characteristics.
What is Diamond Color & What it Means - GIA 4Cs
The correct way to evaluate diamond color is in precise conditions, under controlled lighting, where stones are compared to masterstones with established color grades. Once properly evaluated, color is documented based on the GIA D-to-Z …
Diamond Treatments | GIA 4Cs
Diamond Annealing: A controlled heating and cooling process used to adjust a diamond’s color. The final color is dependent on the starting material and which atomic defects are present in the stone. The process is very common for creating black diamonds. In …
Where are Diamonds Found? Spotlight on South African …
2023年9月19日 · South African diamonds created the modern diamond industry. Two teenagers — Erasmus Jacobs and Cecil Rhodes — helped make this happen. Learn how Jacobs found the first South African diamond and how Rhodes built up a diamond empire. In this blog, we’ll cover: Erasmus Jacobs’ Surprise Discovery. Cecil Rhodes’ Diamond Empire.
Diamond Fluorescence: Benefits and Drawbacks | GIA 4Cs
2023年7月18日 · Diamond fluorescence is a fascinating phenomenon where diamonds glow when exposed to long-wave UV rays. It can sometimes increase or decrease the value of a diamond. It can also affect diamond appearance—or not.
Home | GIA 4Cs
Bohemian Rings: Bohemian style rings play with unexpected gemstone shapes, setting styles and silhouettes, such as geometric diamond cuts, black diamonds, and rings with open shapes. Some are edgy; others have a more romantic vibe.
What Is a White Diamond? - GIA 4Cs
2016年9月13日 · You’ll often hear the term “white” applied to colorless diamonds that fall within the GIA D-to-Z color scale or chart. But diamonds in the D-to-Z range are not white at all. Their hues can range from colorless (like a drop of pure water) to …
Diamonds in the Rough - GIA 4Cs
2014年4月3日 · Rough diamonds have become so popular that they’re showing up as center stones in engagement rings – traditionally the domain of polished, faceted beauties. These modern engagement rings by Diamonds in the Rough have a contemporary design, yet the rough diamonds give them an ancient look.
Bewitched by Black Diamonds - GIA 4Cs
2014年10月23日 · Natural color black diamonds are notoriously difficult to cut and polish. They have irregular growth patterns because they are polycrystalline, or aggregates of many diamond crystals. They are hard to polish because of numerous graphite inclusions and surface-reaching breaks that can cause pits.