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Rock Crystal Inclusions
Tumbled Stone Collection

Explore the fascinating microworld that was born inside a transparent quartz. This exclusive collection of rare rock crystals with inclusions will take you on a journey into the ancient geological history of our world.

In this box you will find 9 tumbled rock crystals with different types of inclusions:

1. - 3. color variations of rutile inclusions

4. - 5. chlorite inclusions

6. black tourmaline inclusions

7. internal phantoms

8 . epidote inclusions

9. actinolite inclusions

What are inclusions?

A mineral inclusion, or enclosure, is a foreign material trapped inside a host mineral during its growth. These "intruders" can be solid (e.g., other minerals), liquid (e.g., water, solutions), or gaseous (e.g., carbon dioxide). Solid inclusions are the most common, where particles of other minerals create remarkable shapes and patterns inside the stone. Mineral inclusions are highly prized by collectors, especially in the case of complete crystals.

How do inclusions form in rock crystal?

The crystallization of quartz in natural conditions is a long-term geological process lasting millions of years. During this time, changes in pressure, temperature, or the chemical composition of the environment can interrupt the growth of crystals and release other minerals from the surrounding rocks. At that moment, the quartz can trap and enclose fragments of other minerals, such as rutile, tourmaline, or chlorite. Since the enclosed minerals were part of geological processes millions of years ago, this unique natural phenomenon offers us not only a magnificent spectacle but also opens a book of the past that we can read from.


What are phantoms?

Crystal phantoms are specific and highly valued inclusions that occur mainly in quartz. They form through a very interesting process where the growth of the host crystal is interrupted, and new minerals from the surrounding rocks settle on its surface, creating a thin layer. When the crystal's growth resumes, the newly grown mass encloses this outline, creating an internal "ghost" or phantom of the crystal's original shape. This unique phenomenon is literally a historical record that allows us to examine the previous phases of the crystal's growth.

Where can you find quartz with inclusions?

We encounter quartz with inclusions practically everywhere around the world. The best-known deposits are found here:
Brazil is undoubtedly a world leader in the mining of quartz with inclusions. One of the best deposits of rutilated quartz is located in Novo Horizonte in the state of Bahia. Here, rutile forms fine, golden needles that give the crystal a magnificent and unique appearance. Brazil is also rich in quartz crystals with inclusions of green or black tourmaline. These inclusions can create spectacular phantoms or chaotically arranged clusters.
Pakistan and Afghanistan are known primarily for their quartz crystals with chlorite inclusions. Phantoms, which are formed by green layers of chlorite, often appear in the crystals. These phantoms are highly valued for their aesthetic beauty and clarity.
Madagascar is a source of crystals with inclusions of rutile, chlorite, hematite, and goethite. A specific and very rare inclusion is also oil and methane within the quartz.
Europe - In Alpine fissures, you can find magnificent quartz crystals that often contain inclusions of minerals from the surrounding rocks, such as actinolite, epidote, or chlorite. Specimens from the Alps are among the most sought-after by collectors. In the Czech Republic and Slovakia, they can be found in northern Moravia—Žulová, Velká Kraš, or Krásné u Hraběšic are places known for the occurrence of quartz crystals with inclusions.

Illustrative micrographs

Rutile

Rutile inclusions in quartz are very popular among collectors. Inclusions of golden rutile with a hematite center are especially sought after, as they can even create an impressive six-pointed star. Rare rutile inclusions in varieties of quartz occur especially in Brazil. 20x magnification.
This micrograph of quartz shows a characteristic twinned crystal growth of rutile. Twinning is a symmetrical intergrowth where crystals are oriented according to specific rules of crystal symmetry. Brazil, Minas Gerais. 30x magnification.
Rutile inclusions are often accompanied by other minerals that formed simultaneously with the crystal's growth. In this case, a mineral from the feldspar group, probably albite, formed impressive clusters resembling beautiful bouquets on the golden rutile needles. 30x magnification.

Chlorite

This photograph captures an inclusion of ripidolite - a chlorite rich in iron and manganese. It has created a remarkable formation resembling a caterpillar in the quartz. Brazil. 30x magnification.
Even Moravian pegmatites hide a wealth of inclusions. This photograph captures a dense cluster of chloritecrystals that comes from the deposit on Houperk Hill. Bobrůvka, Czech Republic. 30x magnification.

Tourmaline

Here, a rare inclusion of schorl, black tourmaline, is hidden inside smoky quartz from Mozambique. It is a typical accompanying mineral for quartz and smoky quartz crystals in pegmatites. 20x magnification.

Phantoms

This photograph captures a beautiful example of a phantom in quartz. It was created by fuchsite - a green mineral from the mica group. The outline of the original quartz crystal is clearly visible in the image - it serves as a window into the past. The specimen comes from the Itremo deposit in Madagascar. 10x magnification.

Epidote

Crystals of the mineral epidote in quartz are relatively rare. If the host crystal is sufficiently clear, epidote can form impressive inclusions, such as these green needle-like crystals in the image. Minas Gerais, Brazil. 15x magnification.

Actinolite

Minerals from the clinoamphibole group are common inclusions in quartz crystals from Brazil and Madagascar. These green stalks of the mineral actinolite have filled the quartz crystals in the mines near the city of Corinto in Brazil. 30x magnification.