Is there a measurement size you won't go under?

[Shijitake]

I see some very pretty sapphires that are about 3-4mm in length. Wondering if their size is worth their cost (usually $500ish) and size. They're so tiny.

And also, would you never buy a gem smaller than a certain length?

 

[Anne111]

In colored diamonds that size can be very costly, so why not in well colored sapphires, they, too, are rare.

 

[passions4purples]

There's no way of knowing their value without knowing other specs besides measurements. But I generally don't wear a solitaire in anything under 6mm. I have largish fingers, and smaller stones accentuate that. But I'll happily collect smaller stones for a five stone or cluster piece.

 

[dk168]

It depends. A small stone could be used in stackable band or in a design that has multiple gemstones of different colour.
It also depends on the setting. I could make a Gypsy setting for a small stone that provide sufficient finger coverage.
A 5mm band is the smallest width that I would wear on its own on my chunky fingers.
DK

 

[MissyBeaucoup]

The Winza ruby in my avatar ring is 4.0 mm, and my color change garnet is 4.7mm. Below a certain size, even with size 5 fingers, I start wanting a halo or more sidestones. So it would depend on what the gem was, and how rare. But the halos, etc., get expensive very fast, so I tell myself I’m not going to save any money by going too small. I think 6-7 mm is a very wearable size for a solitaire.

Try cutting out a little piece of a post it note in the stone’s mm and sticking it on your finger. That will give you a good idea.