Calcite

In this section you can buy calcite pieces in a wide variety of formats. Exclusive combinations with other minerals such as pyrite, quartz, siderite, fluorite, fluorapatite, boulangerite and many more But that's not all! You will also find unique and fascinating pieces, such as calcite with galena, sphalerite, rosasite or auricalcite, ideal for any collector.

Buy Calcite

Calcite is a fascinating mineral and widely appreciated by collectors around the world. Its variety of colors, shapes and combinations with other minerals make it an essential piece in any collection.

Calcite is a mineral composed mainly of calcium carbonate (CaCO3). It forms in a wide variety of geological environments, from sedimentary deposits to volcanic cavities and hydrothermal rifts . It is one of the most common minerals in the Earth's crust, but its beauty and variety make it a coveted mineral among collectors.

Characteristics of Calcite

The chromatic diversity of calcite and formations such as rhombohedrons, prisms and druses make calcite a favorite among collectors and an essential mineral in any collection.

Additionally, the double refraction of this mineral is a unique optical characteristic that causes objects to appear double when viewed through a transparent glass, being especially notable in optical calcite, known as Iceland spar.

Chemical composition

It is composed of calcium carbonate (CaCO₃) . Its crystal structure is based on the trigonal system with a hexagonal arrangement. The chemical formula of calcite is the same in all its varieties, although the impurities present can influence the different colors that this mineral presents.

Hardness

It has a hardness of 3 on the Mohs scale , making it relatively soft compared to other minerals. Therefore, it requires special care to avoid scratches. Despite this, it remains highly appreciated due to its unique crystalline formations and the variety of combinations that can be found with other minerals.

Color

The color of calcite varies depending on the inclusions and impurities present . The most common varieties include white (optical calcite), yellow (honey calcite), orange (with warm, vibrant tones), blue (commonly found in Mexico), green (rare and valuable), and pink (soft and delicate). You can also find shades such as gray, brown, red and black.

Crystalline system

Calcite has a trigonal crystal system . Its crystals usually form in rhombohedrons, the typical crystalline shape, or other geometric structures with trigonal symmetry, such as scalenohedra, prisms and druses.

Fracture

Calcite presents a conchoidal and perfect fracture in three directions , which means that when broken it forms curved and smooth surfaces, like those of a shell. This property is characteristic of minerals with a compact and uniform crystalline structure.

Glow

The luster of calcite can be glassy or earthy. In its purest crystalline form, it reflects light in a way that creates a translucent and shiny effect. This shine is maintained even in calcite varieties with impurities, making it a visually attractive mineral.

Calcite Varieties

Calcite is known for its incredible variety of colors, shades and shapes, making it one of the most appreciated stones among collectors. Each variety has unique characteristics that make it special and coveted. Below are some of the most common varieties:

Yellow Calcite: Also known as honey calcite, it features bright, warm golden tones that evoke the warmth of the sun. It is a variety appreciated for its vivid color and brightness.
Blue Calcite: Often found in Mexico, this variety is rarer than others, with shades ranging from light blue to deep blue. Its color is due to inclusions of copper or cobalt, which makes it especially attractive.
White calcite: The most common, also called optical calcite, is characterized by its clarity and purity. Its transparent crystals have the optical property of double refraction, which makes it an essential piece for collectors and scientists.
Orange Calcite: It has a bright and vivid color that makes it stand out in any collection. Its orange tones come from iron inclusions, giving it a warm and energetic appearance.
Pink Calcite: Soft and delicate, ideal for the most refined collections. The pink tones of this variety come from manganese inclusions, providing a serene and romantic beauty.
Green Calcite: Rare and valuable, offering a unique visual appeal. The green color of this variety is the result of inclusions of minerals such as copper or iron.

In addition to these main varieties, calcite can also be found in other shades such as gray, brown, red and black, each bringing its own beauty and uniqueness to the world of minerals.

Natural calcite in different combinations

These color variations make calcite an incredibly versatile mineral and sought after by collectors. Additionally, in our mineral store we offer a wide variety of calcite pieces for collectors. From raw calcites, through polished stones and minerals, to combinations with other minerals such as pyrite, quartz, siderite, fluorite and more.

Calcite with fluorapatite, arsenopyrite, quartz, siderite and muscovite: Pieces that combine calcite with rare and valuable minerals, creating a fascinating mixture. Fluorapatite adds green and bluish tones, while arsenopyrite adds a metallic shine.
Fluorite, calcite and pyrite: A striking combination of fluorite and calcite with pyrite, which adds a golden glow to the piece. Fluorite provides vibrant colors, while pyrite provides a bright golden contrast.
Calcite, pyrite, sphalerite and quartz: Combinations that highlight the mineral diversity of calcite with other equally impressive minerals. Pyrite and sphalerite provide metallic colors, while quartz adds clarity and brilliance.
Calcite and barite: Calcite occurs next to barite, forming complex and attractive patterns. Barite can add white, yellow or bluish tones, perfectly complementing calcite.
Calcite with Rosasite, Aurycalcite, Olmiite, Dioptase and Other Rare Minerals: These exclusive pieces offer a unique insight into rare mineral combinations with calcite. Rosasite provides blue-green tones, while auricalcite and olmiite add bright, exotic colors.
Calcite with galena, boulangerite and tetrahedrite: The metallic luster of these minerals adds a unique visual contrast to calcite. Galena, with its leaden shine, and boulangerite, with its grayish tones, create striking and unique combinations.
Calcite with Quartz: Quartz provides unique clarity and brilliance when combined with calcite. Quartz crystals can be clear, smoky or even pink, creating pieces of great visual appeal.

Calcite for collectors

Selecting the perfect piece of calcite for a collection can be a challenging task due to the wide variety of colors, shapes and combinations in which this mineral occurs. However, a few key tips can help you find the ideal piece.

Clarity and transparency: One of the first aspects to consider is the clarity and transparency of the calcite. Clear, clean specimens are generally more valuable and appreciated among collectors. Transparency highlights the natural beauty of the mineral and, if it is an optical calcite, allows you to appreciate its double refraction property. For example, white calcite (also called Iceland spar) is known for this characteristic. Make sure the pieces do not have too many inclusions or impurities, as they can affect their visual appeal.

Color: Color is another fundamental aspect when choosing a piece of calcite. This mineral can range from white, yellow, orange, pink, blue, green and more, depending on the inclusions and impurities present. Each color has its own appeal, but in general, bright and homogeneous tones in pieces without combinations are preferred. Honey (yellow) calcite, Mexican blue calcite, green calcite, and pink calcite are some of the most sought after varieties. When selecting a piece of calcite, look for bright, saturated colors, as these pieces are often more valuable and appreciated by collectors.

Crystal formation: Crystal formation also plays a crucial role in selection. Well-formed and clearly defined crystals are the most appreciated. Rhombohedra, scalenohedra, and hexagonal prisms are common shapes in calcite, and each offers a unique visual appeal. Crystals in rhombohedrons are typical of calcite and are usually one of the most common forms. Scalenohedra, meanwhile, have sloping faces like pyramids, giving them a distinctive appearance. Additionally, crystals in hexagonal prisms can end in six-sided pyramids, adding variety and complexity to the pieces.

Combinations: Pieces that combine calcite with other minerals tend to be more valuable and attractive. Calcite is often found in combination with minerals such as pyrite, quartz, galena, fluorite, siderite and many others, creating unique visual contrasts. For example, the combination of calcite with pyrite offers a brilliant golden contrast, while calcite with quartz can present an interesting mix of clarity and color. Look for attractive and rare combinations to add a special touch to your collection.

Geographic Origin: The geographic origin of the piece is also important, as some regions are known for producing unique varieties of calcite. Blue calcite, for example, is often found in Mexico, while honey (yellow) calcite comes from various regions of Europe, including Spain. Optical calcite (white) comes from Iceland and Mexico. Knowing the geographical origin can help you assess its rarity and determine its authenticity.

By following these tips, you will be able to find the perfect calcite piece for your collection, one that combines clarity, color, crystal formation, mineral combinations, and geographical origin in a balanced way.

Several factors influence the value of a piece of calcite :

Rarity: Determines whether the mineral is common or rare. Varieties such as blue and green calcite are more valuable due to their scarcity.
Purity: Evaluate whether it has inclusions or impurities. Pure and clean pieces are more appreciated.
Size: Larger pieces are usually more valuable. However, the quality of the glass is also important.
Combinations: The presence of other minerals can increase its value. Look for combinations with minerals such as pyrite, quartz, galena and siderite.

To maintain the beauty and quality of your calcite pieces , it is essential to follow some key care and conservation guidelines. Calcite is a relatively soft mineral , with a hardness of 3 on the Mohs scale, making it prone to scratches and damage . Additionally, some varieties are sensitive to chemicals and sunlight.

Cleaning: Calcite is susceptible to attack by acids and strong chemicals, so it is important to avoid the use of household cleaners and vinegar. To clean it properly, fill a bowl with warm water and add a small amount of mild soap, such as dish detergent. Place the calcite piece in the water and use a soft bristle brush to remove any dust and dirt. Avoid rubbing hard to avoid scratching the surface. Then, rinse with clean water to remove soap residue and dry with a soft cloth or let it air dry.

It is best not to use ultrasonic cleaners, as they can cause damage to the glass, especially the more delicate pieces. Manual cleaning is the safest option.

Storage: To protect your pieces, store them in a dry place, away from sources of humidity such as bathrooms or kitchens, as humidity can dull their natural shine. Padded cases are ideal for protecting small pieces, while light-controlled display cases are recommended for larger pieces. Make sure there is good ventilation to avoid moisture buildup.

Place the calcite pieces apart from each other to prevent them from scratching each other. Use fabric or foam dividers in the cases if you have several small pieces. Avoid placing them on shelves where they can fall or receive knocks.

Sun Exposure: Direct sunlight can cause discoloration and deterioration in some varieties. To avoid this, place the pieces away from windows and sources of direct sunlight. Calcite can lose its color if exposed to the sun for long periods. If you use display cases, make sure they have controlled lighting or artificial lighting, such as LEDs, that do not emit heat.

Handling and transportation: To avoid oil stains and fingerprints on parts, wear cotton or latex gloves. Hold the pieces firmly but gently, placing one hand underneath for additional support.

If you need to transport the calcite, wrap each piece individually in bubble wrap or soft cloth and place them in a rigid box with padding to prevent them from shifting.

By following these tips, you will be able to maintain the beauty of your calcite pieces and ensure that they remain in the best possible condition for display or collection.

Calcite minerals and stones at the best price online

In our online store, we pay special attention to our natural calcite offers so that you can find the stone you are looking for at the best price. We offer a wide variety of calcite pieces for collectors and mineral lovers in general, from raw pieces to exclusive combinations with other minerals such as pyrite, quartz, galena and siderite.

Explore our entire calcite catalog and find the perfect piece for your collection. Buying calcite in our online store is easy, safe and affordable. Get your favorite calcite at a cheap price and enjoy all its properties and benefits!

"The green calcite I bought here is simply spectacular. The color and crystalline formation make it the jewel of my collection."

José, geologist

CALCITA, HEMIMORFITA, CONICALCITA — CALCITE, HEMIMORPHITE, CONICHALCITE

"The variety of raw calcites is amazing. I found exactly what I needed for my rare mineral collection."

Javier, mineralogist

"The calcite with sphalerite that I purchased here has been a great addition to my collection. The contrast between the metallic crystals and the white calcite is spectacular."

Ana, mineralogist and university professor