Sapphire Price per Carat: What 185 Real Stones Cost

Every figure below comes from stones on this site. Asking price divided by carat weight, one stone at a time, then the median for each colour. No third-party ranges, no estimates.

Read the stone count before you read the price. Blue and pink carry 83 and 42 stones, so those medians mean something. Padparadscha and lavender carry two each. Treat them as an indication, not a benchmark. A price chart that hides its sample size is telling you a story rather than a number.

Across all 185 sapphires the median sits at $622 a carat.

Blue sapphire in that table spans eight-fold, and it is all blue sapphire. Four things explain nearly all of it.

Colour, and not just the hue

Per GIA, the most important influence on a blue sapphire's value is its colour. The stones that command the highest prices per carat are velvety blue to violetish blue, medium to medium-dark in tone, with strong to vivid saturation. The saturation should go as strong as it can without darkening the tone and killing the brilliance. At the bottom of the same scale sit stones with a greenish blue bodycolour, visible colour zoning, a greyish cast, or a tone that is very light or very dark. Two stones both labelled "blue" can sit four hundred dollars a carat apart on that alone.

For colour-change sapphire the order shifts. There, the strength of the change is the value factor that matters most, and bodycolour comes second.

Where the colour sits

A sapphire can hold beautiful colour that only shows at one angle. Set in a ring, it goes flat. That stone is cheaper for a reason no chart records.

Clarity, and how it reads

Sapphire is expected to hold inclusions. What matters is whether they interrupt the light. A clean-looking 1.5 carat stone with a silk cloud you never notice is worth more than a technically cleaner stone carrying one visible fracture.

Cut

Most commercial sapphire is cut to save weight, not to look its best. A stone cut for beauty loses material, and the survivor costs more per carat because there is less of it.

For a sense of how far the bottom goes: GIA notes that black sapphire, very dark blue that reads black in normal light, often sells for under one dollar a carat. Same species, same Mohs 9, four orders of magnitude from the top of our table.

Search for a sapphire price chart and you will find neat grids. Good, better, best. Three numbers a row. They are comfortable to read and close to useless, for one reason.

Nobody defines the grades. "Fine blue" is not a standard. No body issues it, there is no threshold to check it against, and no way to hold a seller to it. The same stone can be fine on one site and commercial on another, and both descriptions are honest, because the word means whatever the person writing it needs it to mean.

That problem runs right through the trade, the same way "semi-precious" is a marketing invention rather than a category. A price grid built on undefined grades inherits the same weakness.

The alternative is not a better grid. It is a price attached to a stone you can look at.

Two things buyers ask about that we are not going to fake.

Origin. Ceylon, Madagascar and Kashmir do carry premiums, and Kashmir material at auction sits in a different world from anything in this table. Our own records do not carry origin on most of the inventory, so we will not publish an origin premium built on six stones. If a chart prices origin without a laboratory report behind each line, ask what it is built on.

Heat treatment. Unheated sapphire commands a premium over heated material, and the gap widens as quality rises. We cannot put a number on it from our data. What heat does to a stone, and how to read a report that mentions it, is covered in our guide to heated versus unheated sapphire.

Naming the edge of your own data is not a weakness. Every chart has one. Most do not say so.

1. Convert to price per carat. A $1,400 stone at 2.10 carats is $667 a carat. Total prices are not comparable, per-carat prices are. This is the step most buyers skip.

2. Compare inside the same colour. A yellow sapphire at $366 a carat and a padparadscha at $1,314 are not competitors. The table above exists so you can put a quote next to its own family.

3. Ask what the grade word means. If a seller writes "fine" or "AAA", ask which scale, issued by whom. Someone who sources their own stones can answer in one sentence. A reseller usually cannot.

4. Ask to see the stone under daylight and under warm light. Colour that holds in both is worth what it is asked. Colour that collapses under one is the reason the stone is cheap, and nobody volunteers that.

If you want to run the comparison on real stones rather than a chart, our blue sapphires, pink sapphires and teal sapphires all carry their weight and price on the page.