Diamond type classification refers to impurities within the crystal structure (mainlynitrogenandboron) is a scientific classification method based on the presence or absence and condition of SpecificallyType 1a, Type 1b, Type 2a, Type 2BIt is roughly divided into four types.

In other wordsType 2 diamonds account for only 1-2% of all diamonds.It is a rare quality that only exists. It can be said to be a more scientific indicator of "identity" that is different from the general 4Cs (color, clarity, cut, carat).

Type 2a diamonds are diamonds that contain almost no impurities such as nitrogen or boron.High purity natural diamondIt means. Of the world's natural diamond productionOnly less than 1-2%It is said that there are only"Miracle Diamond"Also called.

The historically famous "Cullinan" and "Koh-i-Noor" are also classified as type 2a, and have a prestigious lineage that has been loved by royalty and the wealthy.

Even when viewed as a loose diamond, the difference is obvious. From the perspective of asset value, it is highly convertible into cash and is attracting attention as a gemstone suitable for long-term holding.

Type 2B diamonds contain almost no nitrogen and instead contain trace amounts of nitrogen.boronA diamond that contains Natural due to the action of boronblue (blue)exhibits,Electrical conductivity as a semiconductorIt has unique properties that other diamonds do not have.

It is a gemstone that is highly valued not only as jewelry but also as a collection item and asset.

The difference between Type 2a diamond and Type 2B diamond is"Does it contain boron?"It boils down to one point. This greatly changes the appearance, properties, and uses.

In appearance,Type 2a is "ultimate transparency", type 2B is "mysterious blue"can be identified as However, accurate determination is required by a specialized organization.Spectroscopic analysis (FTIR inspection)is required, and is proven by being clearly marked on the GIA or CGL certificate.

The reason for the scarcity is that it is formed undergroundseverity of conditionsIt is located in Type 2 diamonds are found in deeper locations (Deep in the mantle, over 400km underground), it is said to be formed in a purer carbon environment, and the probability of its formation in nature is extremely low.

In addition, in recent years the followingmarket factorssupports the price:

Now that synthetic diamonds have fallen to less than 1/10th the price of natural diamonds,"Genuine natural and rare quality"The relative value of Type 2A diamonds and Type 2B diamonds is actually increasing.

Yes,GIA(Gemological Institute of America)CGL(Central Gem Research Institute) allows you to add type determination to the certificate. In the case of GIA, a supplementary report (Type Classification Report) can be issued that clearly states "Type IIa" or "Type IIb."

As a general rule, Type 2a diamonds and Type 2B diamonds handled by Selby areType confirmed by two institutions: GIA + CGLWe offer the following.

A "Certificate of Identification" (certifying the type of gemstone) and a "Certificate of Authenticity (Grading Report)" are two different things, so be sure to check the latter when purchasing.

The biggest advantages of purchasing loose diamonds are:threeIt is.

Especially like type 2a diamonds.“Transparency itself” is the core of valueThe golden rule when appreciating and purchasing stones is to observe them loosely and directly under the light, rather than while they are set in jewelry. Professionals always check for shine that is above grade at the loose stage.

First-hand diamonds (formerly known as virgin diamonds/this name is no longer used) areA brand new diamond that has never been in the hands of another person (general consumer)refers to

In the second-hand market, there are a large number of "reused diamonds" that were once sold as jewelry and then recirculated through recycling companies. These are visually indistinguishable, butHandling history, fingerprints, and presence of minute wear.The value changes.

Selby leverages its long-standing overseas trading network,Direct import from polishing factory/local dealer = Direct salesOne of the few stores that does this. Because there is no intermediate margin, we are able to achieve top-class sales volume and price competitiveness in Okachimachi, even though we are first-hand diamonds.

In conclusion,"Specialty store with direct import route"Purchasing at is the most cost advantageous. Type 2a diamonds and type 2B diamonds tend to be expensive due to their rarity.The shorter the distribution channel, the lower the final price。

Furthermore, Selby“Reverse distribution power to overseas buyers”--In other words, because we are able to conduct two-way transactions like a trading company, we are able to obtain purchasing prices that are commercially viable.

In recent years, we have received an increasing number of inquiries from SNS users and rare stone enthusiasts, and the influx of customers via SNS is boosting sales.

Okachimachi is known as Japan's largest jewelry wholesaler district, and is home to a large collection of loose and rare stones. Compare stones of the same qualityLarge number of stores, transparent prices, and a culture where you can purchase like a wholesaler--No other city has all of these things.

Ginza has high land rents, and department stores have high fees, so the diamonds themselves tend to be expensive. However, there are many concerns about not having a store or using social media.There is a tendency for Okachimachi to be chosen as a solution to this problem.It seems that there is.

For those who are seriously looking for loose diamonds, Okachimachi is the place to go.A rare city where you can compare items and compare prices on the same day. If you're looking for the highest quality, such as Type 2a diamonds, it's especially worth comparing multiple diamonds on-site.