去年在和GIA的问信中他们是这么回复的：
Here is a frequently asked question from the Hearts & Arrows website: If the diamond has H&A inscribed on the girdle, doesn’t that prove that it’s a real Hearts and Arrows? The gem laboratories will laser inscribe almost anything on the girdle to identify or personalize a diamond. This alone is no assurance of ideal light performance or real Hearts & Arrows. This is why our website is so important in laying out, in great detail, the prescribed formula of faceting and limited proportion sets necessary in creating these extraordinary gems.
关于第三种解释的说法倒没有听到过，期待有知情的解释，但感觉可信度很高。从问信全文（没贴全）来看，GIA的态度主要是无论刻什么，他们没有保证刻的内容一定真实相符。