11.3 ct brilliant crystal boulder opal blue green on black background showing the full face and bright color play.
11.3 ct brilliant crystal boulder opal blue green shown on fingers with bright blue and green color play.
11.3 ct brilliant crystal boulder opal blue green side view showing the curved dome and blue green fire.
11.3 ct brilliant crystal boulder opal blue green back view showing the natural ironstone base and thin color bar.
11.3 ct brilliant crystal boulder opal blue green on black background showing the full face and bright color play.

This exquisite 11.3ct crystal boulder opal features a luminous blue-green fire that dances across a high-polished surface. Ethically sourced from Winton, Queensland, the opal boasts a striking teardrop silhouette, thick body, and deep internal colorplay. Its translucent base radiates light brilliantly, making it ideal for a high-end pendant or statement collector’s piece.

Features & Benefits:

  • Electric Blue-Green Fire – Vivid, radiant flashes across the entire surface
  • Polished Crystal Body – Brilliant clarity and finish
  • Teardrop Shape – Elegant and versatile for upscale jewelry designs
  • Ethically Sourced from Winton – Premium-grade Australian origin
  • Substantial Thickness – 7.5mm for depth and durability in custom settings
  • October Birthstone – A meaningful and timeless gift for collectors or designers

Registered Shipping $15 under $200
Free Registered Shipping over $201
Free Worldwide EMS Express Shipping over $1000
Free Worldwide FedEx Shipping over $4000
Extra Cost $25 EMS Shipping Upgrade under $200
Extra Cost $10 EMS Shipping Upgrade under $999
Extra Cost $80 FedEx Shipping Upgrade under $3999

All shipping includes complimentary insurance.
Please view our Shipping Policy page for more information.

7 day return and refund policy.
Please view our Return and Refund page for more information.

We offer a lifetime guarantee for natural cracks that may form in our opals.
There is a very low chance that this can happen, however occasionally it might.
Our guarantee excludes any opals sold with existing fractures.
Please view our Terms and Conditions.

Caring for Your Australian Opal

Opal Jewelry

Important: Opals Are Fragile Gemstones
Opals are softer than sapphires, rubies, or diamonds and will crack or chip if struck hard against solid surfaces.

Always remove opal jewelry before:
Sports or physical activities
Manual labor, gardening, or gym workouts
Household tasks where impact is possible (lifting, moving furniture, etc.)

Even a minor knock during everyday wear can cause permanent damage. Treat opals as delicate gemstones, not everyday workwear.

Cleaning Your Opal

Clean with warm water and mild soap. Avoid harsh chemicals like bleach, ammonia, or chlorine. Light exposure to hand soap or dishwashing detergent is safe.

Storage

Store opal jewelry separately from harder gemstones (diamonds, sapphires) to prevent scratching.

Solid Natural Opals

(Black, Boulder, Crystal, White Opal)
Natural solid opals are stable and won't change color or crack from water, humidity, or temperature changes. They are safe to submerge in water and can be worn daily, provided they are protected from physical impact. Solid opals are a single piece of gemstone with no artificial backing, making them ideal for heirloom quality jewelry when handled with care.

Opal Doublets

Opal doublets consist of a thin slice of natural opal bonded to a dark backing. Do not submerge doublets in water as prolonged exposure can weaken the adhesive bond and cause separation or cloudiness. Remove doublet jewelry before swimming, bathing, or washing dishes. Clean with a damp cloth only; do not soak or use ultrasonic cleaners.

Like all opals, doublets are fragile and must be protected from impact.

Not sure which type you have? Solid opals show natural color throughout the stone. Doublets have a visible dark backing layer when viewed from the side.

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11.3 ct Half Moon Crystal Boulder Opal – Blue Green

AU$4,561

In stock

Details

Dimension:

20×13.5×7.5 mm

Weight:

11.3 ct

Type:

Natural Solid Untreated Crystal Boulder Opal

Source:

Winton, QLD, Australia

Sku:

PP332

This exquisite 11.3ct crystal boulder opal features a luminous blue-green fire that dances across a high-polished surface. Ethically sourced from Winton, Queensland, the opal boasts a striking teardrop silhouette, thick body, and deep internal colorplay. Its translucent base radiates light brilliantly, making it ideal for a high-end pendant or statement collector’s piece.

Features & Benefits:

  • Electric Blue-Green Fire – Vivid, radiant flashes across the entire surface
  • Polished Crystal Body – Brilliant clarity and finish
  • Teardrop Shape – Elegant and versatile for upscale jewelry designs
  • Ethically Sourced from Winton – Premium-grade Australian origin
  • Substantial Thickness – 7.5mm for depth and durability in custom settings
  • October Birthstone – A meaningful and timeless gift for collectors or designers

Registered Shipping $15 under $200
Free Registered Shipping over $201
Free Worldwide EMS Express Shipping over $1000
Free Worldwide FedEx Shipping over $4000
Extra Cost $25 EMS Shipping Upgrade under $200
Extra Cost $10 EMS Shipping Upgrade under $999
Extra Cost $80 FedEx Shipping Upgrade under $3999

All shipping includes complimentary insurance.
Please view our Shipping Policy page for more information.

7 day return and refund policy.
Please view our Return and Refund page for more information.

We offer a lifetime guarantee for natural cracks that may form in our opals. There is a very low chance that this can happen, however occasionally it might. Our guarantee excludes any opals sold with existing fractures.
Please view our Terms and Conditions.

Caring for Your Australian Opal

Opal Jewelry

Important: Opals Are Fragile Gemstones
Opals are softer than sapphires, rubies, or diamonds and will crack or chip if struck hard against solid surfaces.

Always remove opal jewelry before:
Sports or physical activities
Manual labor, gardening, or gym workouts
Household tasks where impact is possible (lifting, moving furniture, etc.)

Even a minor knock during everyday wear can cause permanent damage. Treat opals as delicate gemstones, not everyday workwear.

Cleaning Your Opal

Clean with warm water and mild soap. Avoid harsh chemicals like bleach, ammonia, or chlorine. Light exposure to hand soap or dishwashing detergent is safe.

Storage

Store opal jewelry separately from harder gemstones (diamonds, sapphires) to prevent scratching.

Solid Natural Opals

(Black, Boulder, Crystal, White Opal)
Natural solid opals are stable and won't change color or crack from water, humidity, or temperature changes. They are safe to submerge in water and can be worn daily, provided they are protected from physical impact. Solid opals are a single piece of gemstone with no artificial backing, making them ideal for heirloom quality jewelry when handled with care.

Opal Doublets

Opal doublets consist of a thin slice of natural opal bonded to a dark backing. Do not submerge doublets in water as prolonged exposure can weaken the adhesive bond and cause separation or cloudiness. Remove doublet jewelry before swimming, bathing, or washing dishes. Clean with a damp cloth only; do not soak or use ultrasonic cleaners.

Like all opals, doublets are fragile and must be protected from impact.

Not sure which type you have? Solid opals show natural color throughout the stone. Doublets have a visible dark backing layer when viewed from the side.

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