Tiger Iron For Sale

Tiger iron is an attractive stone composed of alternating bands of tiger's eye, red jasper, black hematite, and yellow limonite. The undulating, contrasting bands of color and luster make for an attractive specimen. It was formed by ancient, oxygen-producing cyanobacteria over two billion years ago, though there is some debate about whether tiger iron should technically be considered a stromatolite itself.

More About Tiger Iron

40 Items ($4 to $395)

Polished Tiger Iron Stromatolite Sphere - Billion Years #308225

2.6" Polished Tiger Iron "Stromatolite" Sphere - 3.2 Billion Years

$395

Polished Tiger Iron Stromatolite Slab - Billion Years #261991

11.7" Polished Tiger Iron "Stromatolite" Slab - 3.2 Billion Years

$345

Polished Tiger Iron Stromatolite Slab - Billion Years #261994

10.8" Polished Tiger Iron "Stromatolite" Slab - 3.2 Billion Years

$335

Polished Tiger Iron Stromatolite Slab - Billion Years #261992

11.1" Polished Tiger Iron "Stromatolite" Slab - 3.2 Billion Years

$335

Polished Tiger Iron Stromatolite Slab - Billion Years #261998

11.2" Polished Tiger Iron "Stromatolite" Slab - 3.2 Billion Years

$335

Polished Tiger Iron Stromatolite Slab - Billion Years #261993

9.9" Polished Tiger Iron "Stromatolite" Slab - 3.2 Billion Years

$325

Polished Tiger Iron Stromatolite Egg - Billion Years #308715

3.1" Polished Tiger Iron "Stromatolite" Egg - 3.2 Billion Years

$195

Polished Tiger Iron Stromatolite Sphere - Billion Years #308770

2.95" Polished Tiger Iron "Stromatolite" Sphere - 3.2 Billion Years

$195

1.6" Polished Tiger Iron Hearts

$9.00 (Bulk Discounts)

.9" Polished Tiger Iron Sphere

$4.00 (Bulk Discounts)

1.3" - 1.5" Tumbled Tiger Iron

$4.00 (Bulk Discounts)

Free-Standing Polished Tiger Iron Stromatolite - Ga #308151

7" Free-Standing Polished Tiger Iron "Stromatolite" - 3.02 Ga

SOLD

Polished Tiger Iron Stromatolite Egg - Billion Years #308845

2.2" Polished Tiger Iron "Stromatolite" Egg - 3.2 Billion Years

SOLD

Polished Tiger Iron Stromatolite Sphere - Billion Years #309003

1.65" Polished Tiger Iron "Stromatolite" Sphere - 3.2 Billion Years

SOLD

Polished Tiger Iron Stromatolite Sphere - Billion Years #279707

5.7" Polished Tiger Iron "Stromatolite" Sphere - 3.2 Billion Years

SOLD

Polished Tiger Iron Stromatolite - ( Billion Years) #64794

14.5" Polished Tiger Iron "Stromatolite" - (2.7 Billion Years)

SOLD

Polished Tiger Iron Stromatolite Bookends - Billion Years #129429

7.1" Polished Tiger Iron "Stromatolite" Bookends - 3.02 Billion Years

SOLD

Polished Tiger Iron Stromatolite Section - Ga #234606

13.7" Polished Tiger Iron "Stromatolite" Section - 3.02 Ga

SOLD

Free-Standing Polished Tiger Iron Stromatolite - Ga #234608

10.4" Free-Standing Polished Tiger Iron "Stromatolite" - 3.02 Ga

SOLD

Polished Tiger Iron Stromatolite Slab - Billion Years #178776

13.1" Polished Tiger Iron "Stromatolite" Slab - 3.02 Billion Years

SOLD

Banded Tiger Iron Stromatolite - Free-Standing Piece #64778

8.2" Banded Tiger Iron "Stromatolite" - Free-Standing Piece

SOLD

8.2" Polished Tiger Iron Slab - (2.7 Billion Years Old)

SOLD

Gorgeous Tiger Iron Stromatolite - ( Billion Years) #22496

Gorgeous 12" Tiger Iron "Stromatolite" - (2.7 Billion Years)

SOLD

Polished Tiger Iron Stromatolite Bookends - Billion Years #129427

5.2" Polished Tiger Iron "Stromatolite" Bookends - 3.02 Billion Years

SOLD

Banded Tiger Iron Stromatolite - Mt Brockman ( Billion Years) #22484

Banded Tiger Iron "Stromatolite" - Mt. Brockman (2.7 Billion Years)

SOLD

Free-Standing Polished Tiger Iron Stromatolite - Ga #221781

6.5" Free-Standing Polished Tiger Iron "Stromatolite" - 3.02 Ga

SOLD

6.5" Polished Tiger Iron - (2.7 Billion Years Old)

SOLD

Banded Tiger Iron Stromatolite - Australia ( Billion Years) #22493

Banded Tiger Iron "Stromatolite" - Australia (2.7 Billion Years)

SOLD

Banded Tiger Iron Stromatolite - Australia ( Billion Years) #22497

Banded Tiger Iron "Stromatolite" - Australia (2.7 Billion Years)

SOLD

Polished Tiger's Iron Section - South Africa #128527

6.5" Polished Tiger's Iron Section - South Africa

SOLD

More About Tiger Iron

Tiger Iron is a stunning, layered gemstone that captivates with its vibrant, banded patterns and rich earthy tones. This stone is composed of alternating layers of golden Tiger’s Eye, red Jasper, and black Hematite, and its beauty stems from both its color contrast and its geological significance. Known as a "banded iron formation," or BIF, Tiger Iron was formed over billions of years through a fascinating geological process, making it both a visual wonder and a valuable artifact of Earth’s history.

Tiger Iron belongs to the family of banded iron formations, some of the oldest rock formations on Earth. These BIFs formed during the Precambrian era, primarily between 1.8 to 2.5 billion years ago, when the Earth’s atmosphere and oceans were vastly different from today. During this period, the oceans were rich in dissolved iron. As cyanobacteria began to release oxygen through photosynthesis, the iron in the water oxidized, forming iron oxides that settled in layers on the ocean floor. Over time, this layering of iron oxides and other minerals, like silica, created the distinct bands that we see today in Tiger Iron.

The stone’s composition is a harmonious blend of three minerals, each contributing unique properties:

Tiger's Eye – This golden-brown mineral, a variety of quartz, is known for its chatoyancy (a reflective quality similar to a cat’s eye) created by aligned fibrous inclusions. The glistening golden bands add visual depth to Tiger Iron.

Red Jasper – A microcrystalline form of quartz, Red Jasper contributes an earthy red hue due to its iron inclusions. It is opaque and adds a stabilizing contrast in color to the stone.

Hematite – The black metallic bands are made of Hematite, an iron oxide mineral, giving Tiger Iron its density and striking contrast. Hematite’s iron-rich composition provides a distinct weight and shine to the stone, adding to its appeal and durability.

High-quality Tiger Iron is primarily sourced from Australia, particularly in the Pilbara region of Western Australia. This area is known for its extensive banded iron formations, making it a rich source of stones like Tiger Iron with well-defined layers and striking colors. South Africa is another notable source, with a long history of mining and exporting banded iron formations.

Due to its quartz and iron content, Tiger Iron is a relatively hard and durable stone, with a Mohs hardness rating of 6.5 to 7. This makes it suitable for jewelry and other items that require a sturdy, resilient material. Its layers offer a range of textures and reflective qualities, making it visually appealing, especially when polished. The natural bands and unique patterns make each piece of Tiger Iron one of a kind.

Banded Iron Formations and Geological Significance

Banded iron formations are geologically significant because they provide insight into the Earth’s early atmospheric conditions. The presence of these formations around the world indicates a time when the Earth’s oceans held vast quantities of dissolved iron and minimal oxygen. As oxygen levels began to rise, it combined with the iron, forming iron oxides and settling on the ocean floor in layered patterns. Over millions of years, these layers compressed and solidified into the durable rock we now call banded iron formations.

Banded iron formations like Tiger Iron are rare and valuable, as they serve as geological markers for understanding the Earth’s transition from an oxygen-poor to an oxygen-rich atmosphere. This change in atmospheric composition, known as the "Great Oxidation Event," was a pivotal moment in Earth’s history, ultimately leading to the conditions necessary for more complex life forms.

Uses of Tiger Iron

Tiger Iron is a popular choice for jewelry due to its attractive patterns and earthy color palette. The layers of golden Tiger’s Eye, red Jasper, and black Hematite create a striking contrast that makes for beautiful pendants, rings, and bracelets. Each piece is unique, with naturally occurring bands that make it a favorite among those who appreciate the natural beauty of stones.Beyond jewelry, Tiger Iron is often used in carvings, sculptures, and other decorative objects. Its density and layered appearance lend well to intricate carving, and when polished, it reveals complex patterns and textures. The stone is ideal for display pieces, paperweights, and other items that showcase its distinctive, banded formation.

Due to its hardness, Tiger Iron is relatively easy to care for. To maintain its polish and avoid scratches, store it separately from other stones or jewelry. Clean Tiger Iron with mild soap and water, avoiding harsh chemicals or abrasive cleaners that may damage its shine. If scratches appear over time, a professional jeweler can often repolish the stone to restore its luster.

More About Tiger Iron

Banded Iron Formations and Geological Significance

Uses of Tiger Iron