Diamond Buying Advice 归档

GIA Holiday Shopping Guide: The Diamond 4Cs Guide For Your Holiday Shopping

November 27, 2014

Holiday shoppers are giving diamonds an overwhelming YES. And it’s not just bejeweled engagement rings that are getting people to say ‘I do’. Recent studies indicate that women plan to buy more diamonds for holidays, birthdays, anniversaries, and “just because”.

(more…)

Bewitched by Black Diamonds

October 23, 2014

With Halloween creeping up on us, black diamonds seem a fitting subject.

Black diamonds, much like brown diamonds, were once outcasts in the diamond world. In the 1928 book, Diamond: A Descriptive Treatise, author J.R. Sutton noted: “Ordinary black diamond is not greatly unlike black sealing wax. Opinions differ as to its virtues as a gemstone.” And until relatively recently, this negative impression still persisted.” (more…)

Changing a Diamond’s Color

October 13, 2014

If you’re thinking of buying a colored diamond, you’ll want to know if its color is natural or is the result of a treatment process. (more…)

Bravo for Brown Diamonds

September 23, 2014

Just a few decades ago, saying a diamond was brown was considered to be the kiss of death. These ugly ducklings of the colored diamond world were often destined for industrial use. (more…)

Diamonds Shape by Shape

August 26, 2014

When buying a diamond, you know how important the 4Cs are in defining diamond quality. But well before buying comes dreaming. And when you envision the perfect diamond you’ll own one day, chances are the first thing that comes to mind is its shape. (more…)

The Green Diamond

August 21, 2014

Colored diamonds have a special allure, and rare natural color green diamonds may be the most intriguing of them all.

The green color in a diamond is the result of exposure to radiation. The source of the radiation can be naturally occurring or performed in a laboratory. Natural radiation is the result of the diamond being exposed to radioactive uranium from rocks near the earth’s surface. Artificial irradiation is achieved in a lab using either a linear accelerator (called a linac), gamma rays or a nuclear reactor. (more…)

Digging into Diamond Types

July 9, 2014

Serious diamond connoisseurs consider a diamond’s 4Cs as essential information. Some buyers might also want to know about the diamond type. But what exactly does diamond type mean? (more…)

The Beauty of Blue Diamonds

July 7, 2014

Blue diamonds are extremely rare, exquisitely beautiful, and rich in lore. This special combination has made them coveted by diamond lovers and jewelry connoisseurs.

How rare are blue diamonds? To find that glittering needle in the haystack, tons of ore have to be unearthed. And when a blue diamond is found, you can imagine the excitement it causes. (more…)

Yearning for Yellow Diamonds

June 27, 2014

If you love yellow diamonds, you’re not alone. Diamond connoisseurs spend millions on these stunning gemstones. (more…)

Tips on Getting a Jewelry Appraisal

June 12, 2014

Does GIA provide appraisals? It’s a frequently asked question we often get from consumers trying to determine the value of a gemstone or piece of jewelry. (more…)

Famous Diamonds: The Taylor-Burton Diamond

June 10, 2014

Like the famous Elizabeth Taylor Diamond, the Taylor-Burton Diamond was another of Richard Burton’s extravagant gifts to wife Elizabeth Taylor during their public and tumultuous marriages. The couple’s emotionally-charged private life often drew as much attention as their movie roles, and their luxurious tastes, Taylor’s love for diamonds especially, were legendary. (more…)

Famous Diamonds: Granny’s Chips

May 26, 2014

In addition to Cullinan I and the already featured famous diamond Cullinan II, the 3,106 carat (ct) Cullinan rough also produced stones III-IX, plus 96 smaller diamonds. Asscher, the diamond cutting firm, retained these diamonds as payment for cutting and polishing the Cullinan rough. The government of South Africa purchased most of them and gave the diamonds to Queen Mary in 1910. (more…)

GIA 4Cs Diamond Blog