Boulder Opal

Add one script tag to your page:

<div data-gemfyi="entity" data-slug="boulder-opal"></div>
<script src="https://cdn.jsdelivr.net/npm/gemfyi-embed@1/dist/embed.min.js" defer></script>

Embed as an iframe:

<iframe src="https://gemfyi.com/iframe/entity/boulder-opal/?style=modern&theme=light" width="420" height="400" frameborder="0" loading="lazy" style="border:0;border-radius:10px;max-width:100%"></iframe>

Paste the URL in WordPress, Medium, or Ghost:

https://gemfyi.com/es/gems/boulder-opal/

Shields.io-compatible SVG badge:

Boulder Opal badge ![Boulder Opal](https://gemfyi.com/badge/entity/boulder-opal.svg)

Web Component:

<gemfyi-entity slug="boulder-opal"></gemfyi-entity>
<script src="https://cdn.jsdelivr.net/npm/gemfyi-embed@1/dist/embed.min.js" defer></script>

Physical & Optical Properties

Mohs Hardness 5,0 – 6,5
Specific Gravity 1,98 – 2,25
Refractive Index 1,37 – 1,47
Crystal System Amorphous
Luster Vitreous
Cleavage None
Fracture Conchoidal
Color white
Pleochroism Absent

Mohs Hardness

Mohs Hardness: 5,0 – 6,5
1 Soft10 Hard

Crystal System

Value & Market

Price Tier Budget (< $50/ct)

About Boulder Opal

El ópalo boulder es una variedad australiana de ópalo que se forma en grietas y concavidades de grandes fragmentos o nódulos de roca ferruginosa (ironstone), principalmente arenisca o limolita de Queensland. A diferencia del ópalo blanco o negro, se extrae y presenta unido a su roca madre, que forma parte integral de la gema tallada. Este fondo de roca oscura potencia el juego de colores del ópalo, produciendo efectos similares a los del ópalo negro. Los mejores ejemplares muestran un mosaico de colores brillantes sobre el fondo oscuro de la ironstone. Es una gema exclusivamente australiana muy valorada.

Jewelry Use

Durability 4/10

Science FYI Family

Frequently Asked Questions

What is Boulder Opal?
El ópalo boulder es una variedad australiana de ópalo que se forma en grietas y concavidades de grandes fragmentos o nódulos de roca ferruginosa (ironstone), principalmente arenisca o limolita de Queensland. A diferencia del ópalo blanco o negro, se extrae y presenta unido a su roca madre, que forma
What is the hardness of Boulder Opal?
Boulder Opal has a Mohs hardness of 5.0 to 6.5, making it moderate for use in jewelry.
What color is Boulder Opal?
Boulder Opal is primarily White.
How much does Boulder Opal cost?
Boulder Opal falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Boulder Opal?
Boulder Opal belongs to the Amorphous crystal system.

More Semi-Precious Gems Gems