This massive 38.1ct natural crystal boulder opal from Winton is a showpiece of geological art, featuring a dreamy display of luminous lavender and emerald green flashes layered over a rich amber matrix. The stone’s large freeform silhouette and polished surface emphasize its depth and complex internal fire. A statement gem for collectors or jewelry artists looking to create a truly unique piece.
✨ Features & Benefits:
✨ 100% Natural Solid Opal – Ethically sourced from Winton, Australia
✨ Striking Play-of-Color – Purple and green flames over a honey-toned matrix
✨ Impressive Size – A bold 38.1ct for collectors or sculptural jewelry
✨ Freeform Shape – Organic and substantial for high-impact settings
✨ Smooth Polished Surface – Ready for custom design or display
✨ October Birthstone – A rare and symbolic gift
✨ Investment-Grade Gem – Perfect for connoisseurs and designers
About Crystal Boulder Opals
Crystal Boulder Opals, or commonly referred to as P!pe Crystal Boulder Opals are a type of opal found in boulder opal mines in Winton.
These opals are found in pockets of sandstone within the boulder opal mine; referred to as ‘crystal boulder’. Read more here about crystal boulder opals
Please be aware that slight color variations in our opals may occur due to differences in screen configurations.
Registered Shipping $15 under $200
Free Registered Shipping over $201
Free Worldwide EMS Express Shipping over $1000
Free Worldwide FedEx Shipping over $6500
Extra Cost $25 EMS Shipping Upgrade under $200
Extra Cost $10 EMS Shipping Upgrade under $999
Extra Cost $100 FedEx Shipping Upgrade under $6499
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.
Australian Opals do not change their appearance after exposure to heat / climate / humidity / water.
An Australian Opal will not be damaged when exposed to light chemicals such as dishwashing detergent or hand soap. You should not however expose your opal to hasher chemicals such as bleach or ammonia.
They are however susceptible to cracking if knocked hard enough. If wearing your opal set in a ring you should always be careful that it is not knocked during physical activities.
If undertaking some form of sport or manual labour, please take off your ring or other opal jewelry so that it is not damaged.
38.1ct Large Crystal Boulder Opal
USD 3,800
Natural Solid Untreated Australian Crystal Boulder Opal Polished Stone
Weight: 38.1 carats
Dimensions: 35x20x8.5 mm
Source: Winton, QLD, Australia
Size and weight are approximate
In stock
This massive 38.1ct natural crystal boulder opal from Winton is a showpiece of geological art, featuring a dreamy display of luminous lavender and emerald green flashes layered over a rich amber matrix. The stone’s large freeform silhouette and polished surface emphasize its depth and complex internal fire. A statement gem for collectors or jewelry artists looking to create a truly unique piece.
✨ Features & Benefits:
✨ 100% Natural Solid Opal – Ethically sourced from Winton, Australia
✨ Striking Play-of-Color – Purple and green flames over a honey-toned matrix
✨ Impressive Size – A bold 38.1ct for collectors or sculptural jewelry
✨ Freeform Shape – Organic and substantial for high-impact settings
✨ Smooth Polished Surface – Ready for custom design or display
✨ October Birthstone – A rare and symbolic gift
✨ Investment-Grade Gem – Perfect for connoisseurs and designers
About Crystal Boulder Opals
Crystal Boulder Opals, or commonly referred to as P!pe Crystal Boulder Opals are a type of opal found in boulder opal mines in Winton.
These opals are found in pockets of sandstone within the boulder opal mine; referred to as ‘crystal boulder’. Read more here about crystal boulder opals
Please be aware that slight color variations in our opals may occur due to differences in screen configurations.
Registered Shipping $15 under $200
Free Registered Shipping over $201
Free Worldwide EMS Express Shipping over $1000
Free Worldwide FedEx Shipping over $6500
Extra Cost $25 EMS Shipping Upgrade under $200
Extra Cost $10 EMS Shipping Upgrade under $999
Extra Cost $100 FedEx Shipping Upgrade under $6499
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.
Australian Opals do not change their appearance after exposure to heat / climate / humidity / water.
An Australian Opal will not be damaged when exposed to light chemicals such as dishwashing detergent or hand soap. You should not however expose your opal to hasher chemicals such as bleach or ammonia.
They are however susceptible to cracking if knocked hard enough. If wearing your opal set in a ring you should always be careful that it is not knocked during physical activities.
If undertaking some form of sport or manual labour, please take off your ring or other opal jewelry so that it is not damaged.
