paul9s的部落格

So you now cognize that you should single purchase your precious stone with a constituted order permit. The ask that gets asked subsequent is "How do I know that the lozenge I am sounding at is the aforementioned one referred to in the certificate?"

I have seen numerous reply to this interview online, best of them satisfactory, but hugely few of them absolute.

The majority of responses recommend deed eightfold self-governing certificates and appraisals. Either two grading certificates, a scaling qualification and a valuation certificate, two grading certificates AND a valuation qualification. The combinations go on.

If a merchandiser is offering you twofold separate certificates and / or valuations, judge them but always guarantee that you know wherever they go from and that they are self-sufficient.

Now, you have sixfold documents stating the characteristics of the gem. But the question motionless stands! "How do I know that the precious stone I am looking at is the identical one revered to in the certificates?"

There are truly lonesome two ways to declare that the diamond matches the credential.

The original blueprint is to similitude the rhomb (under magnification) to the plotting on the scaling warrant. All worldwide agreed grading certificates should have a plotting of the seed. The plotting shows the diamonds interior flaws and outside blemishes.

This trick though, can be serious to the untrained eye, depending on the clearness of the jewel.

The second policy is to guarantee that the diamonds you are superficial at are optical maser extolled.

"Laser lettering is the use of a terribly fine, precise laser support to write out a grading anecdote numeral or tailor-made personal message on the girdle (outside border) of a diamond. The laser written material is unreservedly nonvisual to the nude eye and can singular be seen beside a magnifying magnifying glass. If through with near a sub-zero laser, it does not happening the color or sharpness category of a rhomb and is considered ageless as it can solitary be removed by a white-collar rhomb quarrier."
DCLA Laser written material feature characterization [http://www.dcla.com.au/services_inscription.htm]

The perpetual optical maser writing enables you to draft the closeness of a lozenge at any circumstance. The written material is generally glibly visible below a 10x jewellers simple microscope.

The system for having a lozenge optical maser written more ensures this step. Laboratories method to international standards will not simply chip at any credential numeral onto a gem. The parallelogram must preliminary slip away a verification audition to guarantee that the grading credentials is reliable and the diamond matches the ticket. Only after will that certification cipher be optical maser written onto the parallelogram.

It is besides significant to note the lack of correspondence relating hot and crisp lasers. Cold laser engineering allows first-rate dependability during writing without wounding the rhomb. Cold lasers are utilised by the GIA, HRD, AGS, DCLA. i.e. all the leading supranational laboratories. Hot lasers are collectively utilised during engineering. Low end hot lasers are sometimes used by retailers for branding purposes. These lasers can modify the level or wreckage the small rock.

Make definite that your small rock has been frosty lasered. This will ensure that the stone has not been knocked-out since citations.

You can brainwave much rumour about diamonds at .