Collective Designs White Logo

Purposefully
one of a kind

Create Your Dream Piece

Custom Jewellery Designs

At Collective Designs, every piece begins with a story. Each creation is designed in collaboration with you to reflect your life, your memories, and your individuality.

Distinct

Soul-led

Intentional

Expressive

Meaningful

Timeless

Client Satisfaction Rate
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About Heidi

A Lifetime of Jewellery Design Experience

  • 40+ years in the jewellery industry
  • Certified Gemmologist
  • GIA coloured gemstone diploma
  • Qualified Diamond Grader
  • Specialist in one-of-a-kind designs
  • Based on the Central Coast, NSW

I’m Heidi Plentinger, founder of Collective Designs. I create jewellery journeys that transform memories into meaningful pieces, designed with trust, worn with purpose, and passed down as lasting legacies.

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Services

A Piece For Every Stage of Life

A closeup photo of a man and woman with their custom engagement jewellery designs.

Wedding & Engagement

Bespoke engagement rings and wedding bands that feel personal, intentional and forever. Creatively approach to one of life’s most meaningful chapters.
A black and white image of a custom jewellery designer creating handcrafted bespoke designs

Custom Designs

Inspired by your life, Heidi transforms your story into a piece that is uniquely yours. Every curve, every texture, every shimmer is designed to capture the essence of who you are.
A closeup photo of a custom heirloom jewellery design

Heirloom Redesign

Transform old or inherited jewellery into something fresh and wearable. Thoughtfully redesigned to reflect who you are, while preserving the sentiment of where it began.

Testimonials

Client Feedback

“Excellent service by Heidi, helped me get a new custom ring designed and made for my wife. Great communication from start to finish, well priced, great attention to detail. Will use again and recommend to everyone I can”
– Lewis T
“Heidi has been so wonderful to have on board with designing and creating a gorgeous and personalised engagement ring for my now fiance! She was able to give valuable advice and guidance, all whilst keeping my vision in mind, as well as planning for future additions to make sure they would flow beautifully. I would highly recommend Heidi to anyone not only wanting stunning jewellery designed but also anyone looking for an all round memorable experience!”
– Bree G
“Heidi designed my late grandma’s engagement ring into an absolutely stunning & elegant necklace! She created it especially for me to wear on my wedding day and it was so beautiful and sentimental. Heidi really cares about the journey of jewellery and I couldn’t speak highly of her level of skill, understanding, empathy and creativity. I would recommend her to anyone.”
– Sara J

Our Process

A Better Way to Create Meaning

Ideation

We brainstorm ideas tailored to your vision, exploring creative solutions that bring your project to life.

Consultation

We connect with you to refine ideas, answer questions, and ensure every detail aligns with your goals.

Approval

You review and approve the design, so you’re confident in the direction before we move forward.

Delivery

We bring your vision to life with care and creativity, delivering a result that delights and inspires.

Past Work

Pieces That Became Favourites

Explore a visual collection of custom pieces, heirloom redesigns and symbolic jewellery. Every design tells a quiet, powerful story, shaped by its wearer.

Time is precious heart auction

Meg’s ring

Doherty necklace

Frequently Asked Questions

Any Questions?

How long does it take?

Timeframes vary depending on complexity, but most custom pieces take between 4–8 weeks from initial consultation to final delivery.

Absolutely. Many clients bring heirloom gold or stones to work into a new design.

Pricing varies based on materials, gemstones, and design intricacy. You’ll receive a clear quote after your consultation.

Not at all! Heidi works with clients anywhere, remotely or in person, and regularly travels across Australia to bring your vision to life.

Your Story, Woven in Gold

Whether you’re redesigning something loved or creating something entirely new — Heidi will guide you every step of the way.

Book a Consultation