A black diamond is a genuine diamond where part of the carbon (the diamond is 100% carbon) has either remained uncrystallized in the chemical bond typical of a diamond, or where the diamond has partially returned to the graphite form of carbon due to changed conditions over the course of millions of years. Even a very small amount of ordinary carbon in the crystal structure of a diamond causes the black color. The chemical and physical properties of normal black diamonds are similar to ordinary colorless and transparent diamonds, but their optical properties are of course from completely opaque (opaque) to translucent or partially transparent.

In online stores, you often see fake "Black diamonds" being sold, which in reality are, for example, black tourmaline or hematite. These are genuine natural diamonds, examined and verified by a GIA gemmologist!

Weight: 0.52ct (pair)
Dimensions: 2.7 x 4.1mm (per stone, approx.)
Color: Black
Purity: Good (note the carbon particles that belong to the black diamond)
Grinding: Brilliant/Good

Light/bright spots that may appear in the pictures are usually internal and external light reflections.

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We sell stones in stock individually or in lots to jewelry artists, goldsmiths, investors, collectors and hobbyists. The prices of our stones for sale are *always* below the general wholesale prices, for pricing we mainly use the most well-known and respected publication in the industry, "The Gem Guide".

Our stones for sale in the auction and online store are not "surplus", but on the contrary, stones that our experts "couldn't leave without buying" during their procurement trips. particularly fine/rare/good quality stones for the price. Because our Gemmologists acquire the stones as close as possible to their source, bypassing many normal high-ceiling steps on the way of the raw stone from the ground to the goldsmith's engagement ring or necklace, we are able to forward the stones even from the wholesale step at cheaper prices!

All the stones we sell, starting with the 5 euro citrines, are examined and evaluated by GIA certified Gemologists (GIA Graduate Gemologist, GIA Accredited Jewelry Professional), so you cannot get a better guarantee of the authenticity and quality of the stones. A certificate/quality certificate, written by a GIA Gemmologist, is also available for each stone.

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Those interested in gemstones should remember that online stores are full of outright scammers, where the item for sale is often completely different from what is described in the description. Even in Finnish markets, barely gem-quality stone, mostly translucent due to inclusions and cracks, is constantly being sold as "eye-clean" stone, "Top10", "+++ quality", "best color, top quality" etc. with meaningless and misleading descriptions. Stones from which an expert can immediately see even from bad pictures that the stone may not even be classifiable, due to poor quality/color/grinding, etc. Not to mention the imitations and synthetic stones that are sold as genuine natural stones, either out of ignorance or pure fraud.

Always require the opinion of a qualified expert or a certificate from a respected and known reliable entity for the stone you buy. Only then can you be sure that you will get what you order. The Gemological Institute of America (GIA) is arguably the most respected player in the industry, and the developer of many grading standards. With the expertise of GIA or a GIA-certified gemmologist, you ensure that the stone is what is claimed. The mere "warranty certificate" or "certificate" presented by the seller does not say anything, because anyone can write a note, or even print a nice plastic card called a "certificate", but which has no value when determining the quality and authenticity of the stone. Or selling stone.

The post Musta Timanttipari, 0.52ct appeared first on Gemtrade.Fi.

Paino:1.67ct (yhteensä)
Mitat: 5.95 x 7.99 x 3.50mm, 5.95 x 7.96 x 3.49mm
Color: Medium Dark Blue
Cleanliness: Very Good
Sanding: Oval/Very Good
Processing: Heated

Light/bright spots that may appear in the pictures are usually internal and external light reflections.

Gemtrade Gems

Gemtrade.Fi Responsibility

Gemological Institute of America (GIA)

The post Safiiri Matching Pair 1.67ct Sri Lanka appeared first on Gemtrade.Fi.

Weight: 1.74ct (total)
Dimensions: 6.03 x 7.95 x 3.54mm, 5.95 x 7.95 x 3.57mm
Color: Medium Dark Blue
Cleanliness: Very Good
Sanding: Oval/Very Good
Processing: Heated

Light/bright spots that may appear in the pictures are usually internal and external light reflections.

Gemtrade Gems

Gemtrade.Fi Responsibility

Gemological Institute of America (GIA)

The post Safiiri Sininen Matching Pair 1.74ct Sri Lanka appeared first on Gemtrade.Fi.