Back to IGS | FAQ | Contact

Is it possible to resurface a star sapphire?

I inherited a purple star sapphire from my mother. She used to wear it a lot so it has surface cracks. It was last appraised in 1994 as “The center stone is a pure star, oval shape, 13x15 mm in size, prong set, over 10 carats in weight. The stone has many cracks and crevices.” Is it possible to have the surface re-polished? Should I? Thanks for any recommendations.

2 Likes

Hi there. I think it would be better if you can upload a photo of this star so we can have a better idea of the severity of cracks and crevices.
I know scratches and pits on the surface can be repolished and bring back the star but it may depend on the severity of the cracks on the stone.
Maybe you can search for antique jewelry repair service or lapidary service near your location.
Best of luck!

2 Likes

Cracks and crevices are probably part of the original condition of the stone. It is unlikely that they are wear from use. Many of these stones were poorly cut originally. If the polish is gone, that could be wear, but it is difficult to scratch such a hard stone as corundum. A good cutter should take a look at this stone to see whether it might be improved by recutting. If the cracks don’t appear to go too deep, perhaps recutting would improve it. If done with diamond abrasives, recutting is not that difficult.

1 Like

Many star rubies and sapphires have repeated twinning which can cause disruptions within the crystal. Such areas will show up as breaks, cracks or fissures … and there isn’t much you can do about these unless you want to try to cut the entire area out.
Show picture!

1 Like

Here’s my attempt at photos. I don’t have the right equipment so apologies in advance. You can clearly see the star in the sunlight. There’s a closeup that shows that pits and cracks fairly well. Then I tried a magnified shot with limited success. Just for fun I included the “matching” earrings. There still polished and a little more blue than the ring.


IMG_6317