Bulk Treated Mixed Crackle Quartz- 1kg (approx. 70 Stones)

A 1 kg bag of tumbled crackle quartz in a mix of colours — approximately 70 stones, each with a distinctive web of internal fractures that catch and scatter light.

What You Get

Approximately 70 tumbled stones in a mix of colours. Crackle quartz is typically available in a wide spectrum — blues, pinks, greens, purples, oranges, yellows, and clear — and this mixed bag includes a variety.

Each stone is roughly 20–30 mm — palm-sized, with enough surface area to show off the internal fracture pattern that makes crackle quartz distinctive.

Tumbled and polished to a smooth exterior with a gentle sheen, while the interior fractures remain visible through the translucent quartz.

Treated. Crackle quartz is one of the most openly and obviously treated stones in the gemstone world, and understanding how it is made is part of appreciating it. More on this below.

How Crackle Quartz Is Made Crackle quartz starts life as ordinary clear or milky quartz — silicon dioxide, one of the most abundant minerals on Earth. The quartz is heated to a high temperature and then rapidly cooled (usually by plunging it into cold water or a dye solution). The thermal shock creates a network of tiny internal fractures — cracks that spread through the stone like a frozen spider web. If the quartz is cooled in a coloured dye solution, the dye seeps into these fractures, filling the cracks with vivid colour while leaving the surrounding quartz relatively clear or lightly tinted.

The result is a stone that looks like stained glass from the inside: translucent quartz shot through with veins of bright colour, catching and scattering light in a way that solid-dyed stones cannot. It is beautiful precisely because it is cracked — the damage is the design. Each stone fractures differently depending on its internal structure, so no two pieces have the same pattern.

This is not a treatment that pretends to be natural. Nobody looks at bright pink crackle quartz and thinks it grew that way. It is an openly creative process — closer to glasswork or craft than to gemstone fakery — and it produces something that has its own genuine visual appeal. We mention the process because honesty matters, but crackle quartz has never claimed to be something it is not.

Why It Catches the Eye Most tumbled stones are opaque or semi-opaque — their colour sits on the surface, and light reflects off them rather than passing through. Crackle quartz is different. Because the base material is translucent quartz, light enters the stone and bounces around inside, hitting the coloured fracture lines and scattering in multiple directions. This gives crackle quartz an internal glow that solid-coloured stones lack — it looks lit from within, particularly in natural light or near a window. In a bowl or display, a mix of crackle quartz colours has the visual energy of a jar of boiled sweets: bright, cheerful, and hard to resist picking up.

What People Use These For Crackle quartz's translucency and vivid internal colour make it popular for jewellery making (wire wrapping, cage pendants — the fracture pattern shows beautifully through wire), resin art (the translucency means it interacts with resin differently than opaque stones), decorative displays and bowls, suncatcher projects, plant pot toppings, children's crystal collections, and retail resale. The mixed-colour bag is also useful for colour-sorting activities with children or for creating rainbow-themed displays and crafts.

Physical Details

1 kg bag of treated crackle quartz tumble stones in mixed colours

Approximately 70 stones per bag (natural variation in stone size and density means this is an estimate)

Individual stone size approximately 20–30 mm

Tumbled and polished to a smooth finish

Base material: natural quartz (SiO₂), thermally fractured and dyed

Hardness: 7 Mohs (quartz)

Translucent — light passes through, illuminating the internal fracture pattern

A Note on Gifting Crackle quartz is one of the most visually exciting stones to give — particularly to children, who tend to be captivated by the way the colour lives inside the stone rather than on the surface. A handful of mixed crackle quartz in a clear pouch or jar is an immediately appealing, inexpensive gift. For adults, the stones work well in decorative bowls, as desk ornaments, or as a bright addition to a crystal collection. The mixed-colour bag is also a popular choice for craft makers who want eye-catching material for jewellery or resin projects.

Common Questions Is crackle quartz natural? The base stone is natural quartz. The fractures and colour are created through a heating, rapid-cooling, and dyeing process