








Multicolored hackmanite necklace - UV-reactive gemstone, natural unique piece
Tax included. Shipping calculated at checkout
Delivery time 4-8 working days (EU)
Delivery time 4–6 business days (EU)
Insured shipping from Austria
Produktdetails:
Description
This hackmanite necklace consists of multicolored, smoothly polished hackmanite beads of selected quality. The hackmanite used is a natural gemstone and is rarely available in this variety of colors and purity. The beads are natural, untreated and have an even, high-quality finish.
Hackmanite is known for its so-called tenebrescence effect: the color can change visibly when exposed to sunlight or different light (daylight, artificial light). In a dark environment or under ultraviolet light, the stone returns to its original violet color. This color change is a natural, repeatable effect of the gemstone and makes every wear a special experience.
The pearls have a diameter of approx. 5.9 mm to 5.1 mm and are carefully matched to each other. The total weight of the necklace, including the clasp and silver beads, is approx. 97 ct. This necklace is a unique one-off piece and cannot be reproduced.
Please note:
In order to preserve the natural color effect of the hackmanite in the long term, the necklace should not be exposed to direct, strong sunlight or heat for long periods of time.
Product details:
Gemstone: Hackmanite, natural and untreated
Bead shape: round, smoothly polished
Bead diameter: approx. 5.9 mm to 5.1 mm
Weight: approx. 97 ct (incl. clasp and silver beads)
Chain length: approx. 59.8 cm
Wire: professional stainless steel jewelry wire with 49 strands
Clasp: lobster clasp made from 925 sterling silver, rhodium-plated
Design: handmade, unique piece
The piece of jewelry is made from high-quality, 49-strand stainless steel jewelry wire, which ensures high stability, durability and a soft, pleasant drape. The rhodium-plated sterling silver clasp is easy to care for and permanently protected against tarnishing.
This hackmanite necklace is an exceptional one-of-a-kind piece made from a rare natural stone, crafted with a focus on material quality, care and timeless design.
Elstar Design - quality & craftsmanship
- Handmade unique pieces
- Natural, genuine gemstones
- Shipping from Austria
- High-quality gemstone jewelry since 2012
Gift & shipping
Delivery in a stylish jewelry box or a high-quality pouch - ideal as a gift.
Available for immediate delivery, dispatch within 1-2 working days.
Care instructions
- Store jewelry in a dry and airtight place
- Avoid contact with water, perfume and cosmetics
- Take off before sleeping, showering or exercising
- Do not expose Hackmanite to direct sunlight or heat for long periods of time
Product safety
Handmade jewelry with small parts - not suitable for children under 3 years.
Avoid contact with chemicals.
Unique - natural - handmade.
This hackmanite necklace combines rare gemstone quality with special natural properties and meticulous craftsmanship.
Authenticity of the gemstones
All gemstones at Elstar Design are natural and genuine.
Only grown natural stones are used, no synthetic or colored materials.
Returns & Cancellations
You can return unworn jewelry within 14 days of receipt.
Please return the jewelry in the jewelry box provided.
Choose options
Jewelry with a Special Radiance
This piece of jewelry was created to visibly enhance any outfit
while conveying a sense of naturalness and timeless elegance.
- genuine natural stones with harmonious color brilliance
- each piece unique or produced only in small series
- timeless design – not ephemeral fashion jewelry

Find the Perfect Chain Length
For the necklace to sit optimally, the correct length is crucial. Depending on the style and neckline, it can be worn close to the neck or hang loosely, accentuating the décolletage.
The illustration provides an overview of common necklace lengths, making it easier to choose the right length.

Find the Perfect Watch Strap Width
For the bracelet to appear harmonious, the diameter of the beads plays a crucial role. Depending on the size, the bracelet can appear delicate and subtle or more prominent and expressive.
The illustration provides an overview of the different bead diameters and helps in choosing the right thickness.

Give something that lasts
More than jewelry. A feeling.
For the most important people in your life –
perfect for birthdays, anniversaries, or as a loving surprise in between.
- Exquisite jewelry made from real gemstones.
- Stylishly packaged and ready to create unforgettable moments.
A gift that comes from the heart.

The World of Gemstones
Our gemstones come from all over the world. Over many years, we have built close relationships with gemstone manufacturers – mostly small family businesses that have practiced their craft for generations.
Design, manufacturing, and quality control take place in our studio in Austria. Today, customers in over 49 countries trust us.
Quality Promise
• Authenticity Guarantee – exclusively genuine, natural gemstones
• Transparent declaration of all materials
• High-quality jewelry components from Europe
• Long-standing partnerships with selected manufacturers
Our motivation is to offer unique pieces of jewelry that you won't find everywhere.
Frequently Asked Questions
Order and Contact
All our jewelry is securely and elegantly packaged in our black Elstar jewelry box.
All orders are shipped with the safest, fastest, and most affordable shipping provider. You will receive a separate message with your tracking number after shipping.
All pieces of jewelry are shipped directly from Austria, more precisely from Carinthia.
From here, our carefully packaged, handmade unique pieces begin their journey.
Items will be accepted for a refund of the purchase price or for exchange if they are returned to us within 14 days of receipt of the goods in an undamaged and unworn condition, in their original packaging. More information
Excellent customer service - even online, a given at Elstar. You can reach us by email or via the contact form.
Jewelry
To ensure your jewelry retains its beauty for a long time:
- Store in a dry and protected place
- Clean gently with a soft cloth
- Avoid contact with detergents, perfumes, and cosmetics
- Remove before sleeping, showering, or exercising
An untreated gemstone has not been artificially altered in color or structure.
Types of treatment include:
• Heating (citrine)
• Irradiation (topaz)
• Oiling or dyeing (emerald, agate)
• Filling with glass or resin (ruby)
Sterling silver is a high-quality silver alloy primarily used for jewelry.
It consists of 92.5% pure fine silver and 7.5% other metals, usually copper.
By mixing it with 7.5% copper, it becomes:
• harder and more stable,
• less prone to scratches,
• more malleable.


