Australian Boulder Opal rough labeled Lot A, sitting on a wooden surface. The stone has thick blue and green opal veins woven through brown ironstone with patches of white host material. Strong fire visible in natural cavities. Suitable for cabbing, contour shaping, and lapidary orientation work. Untreated Queensland opal.

Australian Boulder Opal: Uncut Lapidary Rough

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$99.00
$99.00
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Australian Boulder Opal rough labeled Lot A, sitting on a wooden surface. The stone has thick blue and green opal veins woven through brown ironstone with patches of white host material. Strong fire visible in natural cavities. Suitable for cabbing, contour shaping, and lapidary orientation work. Untreated Queensland opal.
  • Australian Boulder Opal rough labeled Lot A, sitting on a wooden surface. The stone has thick blue and green opal veins woven through brown ironstone with patches of white host material. Strong fire visible in natural cavities. Suitable for cabbing, contour shaping, and lapidary orientation work. Untreated Queensland opal.
  • A large piece of Australian Boulder Opal rough on a wooden bench, showing blue, green, and white opal seams running through dark brown ironstone. The surface has natural cavities and ridges with visible fire. Ideal for lapidary cutting, cabbing, and seam-tracking practice. Raw, untreated material from Queensland mining fields.
  • Three pieces of Australian Boulder Opal rough grouped together on a warm-toned wood surface. Each stone shows blue, green, and white opal seams across textured ironstone. Visible fire in multiple angles. Ideal lapidary material for cabochon making, slicing, and practicing seam-following techniques.
  • Boulder Opal rough labeled Lot B, showing three stones with bright blue and green fire streaks within ironstone. White and blue opal veins run across broken surfaces. Natural texture, raw and untreated. Suitable for cutters seeking high-contrast opal patterns and stable host material from Queensland, Australia.
  • Australian Boulder Opal rough labeled Lot A, sitting on a wooden surface. The stone has thick blue and green opal veins woven through brown ironstone with patches of white host material. Strong fire visible in natural cavities. Suitable for cabbing, contour shaping, and lapidary orientation work. Untreated Queensland opal.
  • A large piece of Australian Boulder Opal rough on a wooden bench, showing blue, green, and white opal seams running through dark brown ironstone. The surface has natural cavities and ridges with visible fire. Ideal for lapidary cutting, cabbing, and seam-tracking practice. Raw, untreated material from Queensland mining fields.
  • Three pieces of Australian Boulder Opal rough grouped together on a warm-toned wood surface. Each stone shows blue, green, and white opal seams across textured ironstone. Visible fire in multiple angles. Ideal lapidary material for cabochon making, slicing, and practicing seam-following techniques.
  • Boulder Opal rough labeled Lot B, showing three stones with bright blue and green fire streaks within ironstone. White and blue opal veins run across broken surfaces. Natural texture, raw and untreated. Suitable for cutters seeking high-contrast opal patterns and stable host material from Queensland, Australia.
Australian Boulder Opal: Uncut Lapidary Rough

Australian Boulder Opal: Uncut Lapidary Rough

$99.00
$99.00
Shipping calculated at checkout.
Lot ID

In stock: 1-3 business days

Level up your cabbing with one of the most dynamic lapidary materials on earth.

This is true Boulder Opal, sourced from Queensland’s premier fields.
These regions produce the world’s strongest seam opal: intense color, stable host rock, and natural patterns impossible to fake.

Boulder Opal forms inside ironstone.
The opal grows as veins, seams, and pockets, creating a natural doublet structure that supports thinner domes, contour carving, and dramatic high-contrast finishes. The host rock does half the engineering work for you.

You’re not just cutting opal.
You’re unlocking color that’s been sealed in stone for millions of years.
This is the same geological material that made Australian opal the global standard.

Each lot includes a curated mix of slabs, matrix chunks, and preforms with visible direction, structural stability, and fire potential. Some pieces show immediate surface play-of-color. Others reveal their full fire only during shaping.
No treatments. Just raw material ready for someone who knows how to coax color from stone.

Boulder Opal can produce premium gems, but demands intentional technique.
Beginners should research seam following, void control, backing transitions, and optional stabilization (Cactus Juice or equivalent). If you need guidance, I’m happy to help.

Lot Details
A) 45 grams – ~35×45×27 mm
• Bright fire: green, orange, blue, opaque white opal
• Requires stabilization

B) 13 grams – 3 pieces (dime-size+)
• Same source as A, strong multi-color fire
• Requires stabilization

C) 28 grams – dime to half-dime sized
• Blues, electric greens, occasional orange
• Solid ironstone backing
• No stabilization needed

D) 50 grams – largest ≈ quarter-sized
• Deep blue + cyan with green flecks in banded matrix
• Solid, slightly pre-shaped, high potential

E) 35 grams – main ≈ quarter-sized
• Blue, cyan, purple, with spiderweb veins + green flashes
• Dense banded ironstone; excellent natural pattern

F) 44 grams – two larger than a quarter, one quarter-sized
• Strong banding, milky opal zones with subsurface fire
• Solid structure; minor typical surface cracks

G) 110 grams – slab offcuts
• Mixed fire; each shows color flecking
• Best for advanced cutters or exploratory practice

H) 33 grams – trimmed slabs
• Spiral purple with concentrated green “eyes”
• Likely Yowah Nut fragment. Dense, high-grade host

For the Modern Lapidary
Ships from the Pacific Northwest, USA.

Every order supports Aetherium Innovations and our mission to lower the costs and learning barriers across the skilled art trades.

Bench-tested

Modular by design

Direct builder support

Pacific Northwest built

Build & Support

Aetherium products are developed around real workshop and field workflows. If you need dimensions, compatibility guidance, replacement components, or help adapting this product to your setup, contact the workshop before ordering.
Shipping & Returns

The production estimate shown near the purchase button is the current working lead time for this item. Shipping is calculated at checkout.

If an order arrives damaged, does not match what you received approval for, or you need to request a return, contact us with the order number and photos when applicable. We will review the situation directly and help determine the right next step.

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Why Aetherium

Built like someone has to use it.

We design around real workflows, direct feedback, and the belief that a good tool should expand what its owner can do.

Bench-testedDeveloped around real workshop problems, not trend forecasts.
Small-batchProduced deliberately with clear lead times and direct accountability.
AdaptableModular, repair-minded systems designed to evolve with the work.
Direct supportCompatibility question? You can talk to the person who built it.
Unsure whether this fits your setup?Send the workshop a photo or a short description before you order.
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