Chloroplast Thylakoid Cuff Bracelet

Regular price €88.00
Tax included. Shipping calculated at checkout.


This bracelet is inspired by the interesting architecture of the chloroplast thylakoid membranes. The chloroplast is the site in the plant leaf where photosynthesis takes place, converting light energy to sugar. Within the chloroplast, the light-dependent reactions of photosynthesis occur in the thylakoid membranes. The thylakoids are arranged as stacks of membranes (the grana) that are connected by intergranal or stroma thylakoids to form one cohesive compartment.

3D printed steel is a very strong material and does not bend or flex, so please choose your size carefully. To determine your size, measure your wrist above the wrist bone with a tape measure and consult this chart.

Small = 14.6 cm (5.75 inches) elliptical circumference (50 x 43 mm), opening is 2.8 cm wide

Medium = 17.1 cm (6.73 inches) circumference (58 x 51 mm), opening is 3 cm wide

Large = 19.8 cm (7.8 inches) circumference (67 mm x 59 mm), opening is 3.2 cm wide

Extended wear of a gold plated steel bracelet may result in some wear of the plating on the inside of the bracelet, exposing the steel underneath. 3D-printed steel contains a small amount of copper which can in certain cases turn your skin green. This is normal and harmless and the discoloration should wash off with soap and water.

 Jewelry Shipping

(please scroll down for T-shirt shipping information)

Jewelry in stock will be shipped within 1-2 days.

Delays may occur due to coronavirus-based shipping disruption.

Australia      DHL 10-12 days 16.82 €
Canada DHL 5-8 days 15.80 €
European Union DHL 2-9 days 13.22 €
Germany DHL 1-2 days 4.99 €
Iceland UPS 3-5 days 15.80 €
Jena, Germany 10 km radius local delivery free
Japan DHL 4-6 days 15.80 €
Norway DHL 5-7 days 17.12 €
Switzerland DHL 2-4 days 16.70 €
United Kingdom UPS 3-5 days
18.97 €
United States UPS 3-5 days 15.80 €
Rest of World please contact

You will be notified by mail when your order ships and given a tracking number so that you can follow your shipment. Ontogenie jewelry is shipped internationally from Germany via DHL and other carriers. Your jewelry will be gift-wrapped in original Ontogenie packaging.

In the unlikely event that your jewelry shipment is delayed by your local customs office, you are responsible for paying any fees incurred.

T-Shirt Shipping

T-shirt shipping costs 4 Euros.

Ontogenie T-shirts are printed in Charlotte, North Carolina, USA and Riga, Latvia in Europe. T-shirt printing requires 2-7 days fulfilment time. After fulfilment, your shipment should arrive in 3-10 business days.

In the unlikely event that your shirt shipment is delayed by your local customs office, Ontogenie is not liable for any fees incurred.

tick silver earrings

Ontogenie jewelry is 3D printed in wax and then cast in solid sterling silver, solid brass and solid bronze as well as gold-plated brass. The silver and bronze pieces, and to a lesser extent brass, will tarnish and discolor slightly over time. This is completely normal for these materials. Since moisture tends to accelerate the tarnishing process, I recommend that you don't wear the jewelry in water, e.g., while bathing, showering or swimming. The oils in your skin will also contribute to tarnishing. I recommend polishing the jewelry with a soft cloth after wear and storage in a dark, dry place to slow the oxidation which causes tarnish.

If the jewelry should tarnish, I've found that it can be returned to its original brilliance and color by using a gentle, nonabrasive silver polish. The more detailed and highly textured pieces will be more difficult to polish because of surface variations. To polish these, I recommend using a very soft toothbrush with the silver polish to allow cleaning of small crevices. After polishing, you can remove excess polish by rinsing the jewelry in water and then washing the piece in with a gentle detergent followed by a final water rinse.

xenopus frog lapel pin bronze

The gold-plated materials, however, should not be vigorously polished as the plating is likely to wear off over time. The gold-plated materials are much less susceptible to tarnishing and will probably never need to be polished.

All of the jewelry should be protected from impact against hard surfaces as this could cause scratches.