Most people picture one thing when they hear the word sapphire. Deep royal blue, the color of a class ring or a crown jewel. Montana sapphires are not usually that.
They run teal. Green. Blue that leans gray. Yellow that leans gold. A single stone often carries two or three colors at once. If you have only ever seen sapphire in a chain jewelry case, the first tray of Montana material can be a surprise, and it is the reason people who find these stones tend to stay with them.
Here is what the range actually looks like, and what it means when you are choosing one.
Why the color range is so wide
Sapphire is corundum. Pure corundum is colorless. Every color you see comes from trace elements sitting in the crystal structure, mostly iron and titanium in various proportions.
Montana material tends to carry more iron than sapphire from other parts of the world. Iron pushes color toward green, teal and yellow. Titanium with iron pushes toward blue. When the balance shifts inside a single crystal as it forms, you get a stone with more than one color in it.
That is the short version. The practical version is that no two of these stones look alike, and a color you fall for in one stone may not exist again in the same combination.
Teal
Teal is what Montana is known for now, and for good reason. It is the color that sits between blue and green without committing to either.
Good teal reads clean and saturated in daylight without going dark. Weak teal reads gray and flat. The difference is easy to see when you put two stones next to each other and almost impossible to describe in words, which is why we shoot every stone in natural light rather than a lightbox alone.
Teal is also the most requested color we sell, and demand shows up in price. Expect to pay a premium over comparable blue or green material of the same size and clarity.
Blue
Montana blue is not Ceylon blue. It is usually cooler, sometimes with a gray or steel undertone, and it often holds its color well in low light rather than going black the way some very dark blue sapphire does.
If you want the classic sapphire look with something a little quieter and less uniform, this is the lane. Blue stones with a hint of green at the edges are common and, to a lot of eyes, more interesting than a stone that is one flat color from end to end.
Green
Green Montana sapphire is underrated and usually the best value on the tray. It runs from a soft olive through a deeper forest tone.
Green does two things well. It reads as a gemstone rather than as a colored diamond substitute, and it sits beautifully in yellow gold. If your budget is tight and you want size, green is where you get the most stone for the money.
Parti
A parti sapphire has two or more distinct colors visible in the same stone. Blue on one side, green on the other. Yellow through the center of a teal stone. A band that runs across the pavilion.
Parti stones are polarizing and we like them for it. Some people want an even color and a parti stone will always look like a mistake to them. Other people see one and stop shopping.
Two things worth knowing before you buy one. First, the way the colors sit depends entirely on how the stone was cut, so photographs from a single angle can mislead. Second, parti color is not a flaw and it is not a lower grade. Well-defined, well-placed parti color usually costs more than a single-color stone of the same weight, not less.
Yellow and gold
Yellow Montana sapphire runs from a pale straw to a warm honey. It is not common in the way teal is, and it does something no other color on this list does, which is look completely at home in vintage-style yellow gold settings.
If you are looking for a stone for an heirloom-style piece or a right-hand ring, do not skip past these.
Peach, pink and the odd ones
Peach and pink show up in smaller quantities. So do stones that shift color between daylight and indoor light, moving from a cooler tone to a warmer one as the light source changes.
These are the stones that sell fastest when they appear, because there is no way to order more of them.
Light changes everything
Any colored stone looks different under different light. Sapphire is especially honest about it.
Look at a stone in three conditions before you decide. Outdoors in daylight or by a window on an overcast day. Under warm indoor bulbs at night. Under the fluorescent or LED light in whatever room you are usually in.
A stone that looks perfect in one of those and dull in the other two is a stone you will end up not wearing. A stone that holds its character across all three is the one to buy, and it is worth paying more for.
What color does to price
Roughly, and with a lot of exceptions:
Strong saturated teal sits at the top. Fine blue is close behind. Well-defined parti is next, then yellow and peach, then green, then anything that reads gray or washed out.
Size compounds all of it. Color that is merely good in a one carat stone can be excellent in a two carat stone because there is more material to hold the color. Montana sapphires over two carats are less common than under, and price per carat climbs accordingly.
A note on treatment
Heat is standard practice across the sapphire trade worldwide and has been for a long time. It is not a defect and it is not a secret. What matters is that you are told.
Every stone on our site lists its treatment status on the product page. If you are ever shopping anywhere and cannot find that information, ask, and be careful about a seller who cannot answer.
How to actually pick one
Stop trying to pick a color in the abstract. Look at stones.
Sort by the color family you think you want, then look at everything one size band up and one size band down from your budget. Notice which stones you keep coming back to. Most people come in certain they want blue and leave with teal, or come in wanting teal and leave with a parti stone they did not know existed an hour earlier.
The stones are one of a kind. That cuts both ways. There is no perfect version out there to hold out for, and the one in front of you will not be there next month.