What are the different grades of sapphires?

What are the different grades of sapphires?

Sapphires still fall into the general clarity grading for gemstones categories (Types 1, 2 or 3). However, there are more specific terms that are directly related to the clarity of sapphires. They include: concaves, eye grade, loupe grade and transparency.

How do you tell what grade a sapphire is?

Sapphires are typically graded on a letter scale with AAA being the best and ranging down. With Clarity uses only AAA graded sapphires. These are the top 5% of natural rubisapphirees that are available. They have minimal eye-visible inclusions and a beautiful transparency.

What is the highest grade of sapphire?

We only use AAAA and AAA sapphires in all our jewelry.

• Natural AA. These are the top 50%-75% of natural sapphires available. They have a dark blue color and look opaque.
• Natural AAA. These are the top 20%-30% of natural sapphires available.
• Natural AAAA. These are the top 10% of natural sapphires available.

What is a Type 2 sapphire?

Type 2 Colored Gemstones by their nature have natural inclusions. (Inclusions are the norm) This includes gems such as Andalusite, Crysoberyl, Alexandrite, Corundum (i.e. Sapphire and Ruby), Garnet, Peridot, Quartz, Amethyst, Citrine, Ametrine, Spinel, Tourmaline and Zircon.

What are AAAA sapphires?

Heirloom (AAAA) This category includes the top 1% of sapphire. They have a truly exceptional and deep hue, are very slightly included and exhibit high brilliance.

What is a pink sapphire?

Pink sapphires are made up of the mineral corundum that is colored by trace elements of chromium. This is how they get their beautiful color. If the chromium content is high then you get a deeper red color, which in turn makes the stone a ruby. The Top Ring Is Classified As A Ruby, The Bottom Ring Is A Pink Sapphire.

What does AA mean in jewelry?

AA – Semi clean, well cut and polished gemstones are graded as AA. A – Reasonably clean and well cut gemstones that have noticeable variations are graded A. Commercial – Irregular, cloudy gem stones with visible inclusions are low grade stones that fall under commercial stones used to make fancy jewellery.

What is the grading system for sapphires?

Given the lack of a standardized grading system for sapphires, it is important to be able to differentiate a superior quality sapphire from an inferior quality one. Sapphires come from a family of gemstones called corundums. Typically, all corundums not red in color are classified as sapphires.

What are the additional capabilities of Saphir?

Additional capabilities include rate dependent skin, changing wellbore storage, interference from other wells, gas material balance correction, well model changing in time, horizontal and vertical anisotropy. Saphir includes constant as well as changing wellbore storage models to fit early time behavior.

What is a sapphire?

Sapphire is a precious gemstone, a variety of the mineral corundum, consisting of aluminium oxide ( α- Al 2 O 3) with trace amounts of elements such as iron, titanium, chromium, vanadium, or magnesium.

What are Kashmir sapphires?

Burmese and Ceylon (Sri Lankan) sapphires have been characterized as fine sapphires in Europe for centuries, but Kashmir sapphires now have elite status, as they are no longer being found or mined.