Thunderbolt of Cobalt Brooch

$54.95 AUD

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Hand-assembled from a selection of vibrant resins and featuring a combination of printed and painted details, this Superb Fairywren brooch is part of the third Erstwilder x Jocelyn Proust Designs collaboration. Designed to lift your spirits and your style, Thunderbolt of Cobalt makes a wonderful companion piece for any other Jocelyn Proust designs.

70mm x 50mm (H x W)


The colour of the sky, or the ocean, it's true, but this is one flier who is seldom blue. Zipping through the sky with wondrous speed, you'd think it was chasing lively birdseed.

Each piece is made from laser-cut and layered resin, hand assembled, hand painted and released in limited quantities. As all of our designs are lovingly glued, assembled and painted by hand, there can be very slight variations and blemishes from piece to piece. Due to the hand-mixed nature of the resins in our designs, it is also common and normal to find tiny flecks or bubbles in the resin layers. All in all, this just makes each piece as special and unique as you are.

Brooch clasp is made with 100% stainless steel pin and plated brass screws. Components have changed over time and older designs may be made with other materials. If you have any questions at all, please email the team at hello@erstwilder.com.

Designs come packaged in Erstwilder gift boxes.

Shipping within Australia
FREE Express shipping for all orders over $80
$7.95 flat rate Express shipping for all other orders under $80

Shipping to the USA
Free DHL E-Commerce shipping for orders over $120 (AUD)
$9.95 (AUD) flat rate DHL E-commerce shipping for orders under $120 (AUD)
$14.95 (AUD) flat rate DHL Express Shipping optional

Shipping Internationally (Excluding the USA)
FREE international shipping for all orders over $120 (AUD)
Flat rate $9.95 (AUD) international shipping for all orders under $120 (AUD)
$14.95 (AUD) DHL Express shipping optional

Please note: Not all bag designs are available for shipping to all International regions. Berets will only ship to Australian addresses. You will be notified at checkout if you are unable to complete an order due to shipping constraints. In these instances, please contact your local stockists to find out about availability and to order.

For further information please visit the Shipping FAQs.


We want you to love your Erstwilder purchases and know that having super easy returns is part of why you shop with us, which is why we offer a 60-day return policy for all purchases on erstwilder.com that meet the criteria below:

Items must be returned within 60 days of purchase together with proof of purchase.
Items must be in their original condition with accompanying gift boxes, story cards and swing tags.
Lucky Dips, Perfectly Imperfect and Gift Cards cannot be returned.
No refunds on Embroidery Patterns.
Earrings are not able to be returned for hygiene reasons.
For each order, a maximum of three items can be returned.

For the full policy and further details on how to return items, please visit the
Returns FAQs

Please visit our Care Instructions page for a complete list of care guidelines for all Erstwilder designs and products.

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Customer Reviews

Based on 15 reviews
Ding (Sydney, AU)
very pretty but...

The bird is gorgeously coloured, and very pretty. But the brooch sits awkwardly, no matter which position I try. My least favourite so far.

Sandra H. (Adelaide, AU)
My wonderful new brooches

I recently bought Thunderbolt of Cobalt and Good Omens Owls. I absolutely love both of my brooches. The designs are amazing. The colours are stunning and the expressions on the owls faces are really eye catching. You don’t see anything else this good in this price range or even some other jewellery in a higher price range. The service is also excellent . One of the doctors in the practise that I go wears your jewellery too so I see pieces that I have not seen before. One of the assistants at the chemist keeps me up to date with the latest items on your web site. I love your jewellery.

Cheryl M. (Melbourne, AU)
Kitchen haul

Absolutely love these broaches 💗💗💗

Meredith A. (Melbourne, AU)
Beautiful brooches

I bought four of the recent Jocelyn Proust brooches (Sunny of the Sulphur Crest, Skittles the Sun Lover, Thunderbolt of Cobalt, Acacia in Gold), with the first to be for me and the other three as gifts. Oh dear! I can't bear to give any of them away! They are all so uniquely beautiful. What am I to do?

Sandra F. (Melbourne, AU)
Wonderful Wren

I recently received a beautiful blue wren bird brooch as a surprise birthday present and I was delighted. I have already worn it on several occasions and received wonderful comments. As someone who works with primary school students it is a conversation starter for many students who love to talk about my brooches, particularly the magnificent ones from Erstwilder!

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