| 3,142 sales | 5 out of 5 stars

Hoop Earrings in Niobium. Rainbow Colored 1 Inch (24mm) Hoops



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  • Handmade item
  • Materials: pure niobium, nb, niobium, element 41

These hypoallergenic pure niobium hoop earrings are about one inch in diameter or about 24mm and have a very easy to work yet secure sideways action clasping system.

Niobium is a very interesting metal. It is a platinum-gray color in its natural state as I use it. It is ductile and can be forged much like gold or silver. It is element number 41 in the periodic table of elements and it is the most hypoallergenic material I know of. Unlike stainless steel it is a pure element that does not contain any nickel, lead, cadmium or any of the other allergens.

The colors are created using a machine that I built. It is actually a form of controlled oxidation. By applying a variable voltage, I can create colors like you see on these earrings. there are no dyes or additives of any kind. In fact, there is no color as such. The niobium oxide that I grow on these earrings is actually clear. The colors we see are due to the refraction of light through varying thicknesses of the clear oxide. This is much like the colors we see created by a prism.

All coloring is unique and will vary from pair to pair. These images are a good representation of my rainbow design.


Estimated arrival

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Feb 1-12

Jan 20

Order placed

After you place your order, isidro will take 1-2 weeks to prepare it for shipment.

Jan 27-Feb 3

Order ships

isidro puts your order in the mail.

Feb 1-12


Estimated to arrive at your doorstep Feb 1-12!

Cost to ship


Etsy offsets carbon emissions from shipping and packaging on this purchase.
Etsy offsets carbon emissions from shipping and packaging on this purchase.

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Ships from Marysville, WA
Isidro Nilsson

Isidro Nilsson

Owner of isidro

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931 reviews

5 out of 5 stars

Dawn Gregory Aug 7, 2019

5 out of 5 stars

These earrings are absolutely gorgeous! I was so happy to find that they looked as good in person as they did on Etsy! They are very well-made, and you can tell they were made by someone who truly knows their craft. They arrived quicker than I expected, as well.

Purchased item:

Reviewed by Anonymous Sep 19, 2012

5 out of 5 stars

These earrings are so sweet and I love the colours in them. Something a little different. Thank you so much

Purchased item:

vieve1090 Dec 23, 2017

5 out of 5 stars

Love these earrings. I can sleep with them, they are very dainty and I forget that I am wearing them.. I will order more.

Purchased item:

Penny Hilton Aug 15, 2016

5 out of 5 stars

I absolutely love these earrings!! So pretty!!

Purchased item:

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