MALACHITE Mineral Polished Cabochon Gem Stalactite Teardrop Cab Gemstone For Sale

This totally gorgeous polished malachite teardrop cabochon weighs 90.85 carats, which is the same 18.17 grams. It measures 38 mm x 26 mm x 9 mm.

Hi there, I am selling this really nice large polished Malachite Crystal Cluster Copper Mineral Teardrop shaped Cabochon. It is really beautiful. This specimen was collected from Zaire, which is now called the Democratic Republic of the Congo. I got this fromthe Tucson Gem and Mineral Show and purchased it directly from the miner who collected it. I believe this was the BEST looking piece they had available at their booth at the gem show.

This amazing cab looks a lot more awesome in person. The photos never seem to do them justice. This piece is highly desirable andwould be an excellent addition to any rock and mineral collection or would make an amazing centerpiece to a gorgeous piece of jewelry.If you have any questions, do not hesitate to ask me. Thanks so much for visiting my store and have a great day! I combine shipping on multiple orders so please check out my store for other awesome treasures from nature.

SHIPPING

We ship out within 24 hours of receiving a payment. We can combine shipping to provide you with cheaper shipping for the purchase of multiple items if you are interested, but PLEASE NOTE that we can ONLY give you a combined shipping discount if all items are paid for all at once in a SINGLE PAYMENT!

RETURNS:

If you aren\'t totally and completely thrilled with you item for any reason, we accept returns for full refunds for any reason. So offer and buy with confidence.

We pride ourselves on striving to make sure you have a happy and please y buying experience. All of our items usually come with a free gift as well- just to show our appreciation to you as a buyer.

I offer a money back guarantee on every item I sell.

If you are not 100% happy with your purchase just send me a message to let me know

and I will buy back the item for your full purchase price.

Thank you for looking.

The following is information about this from Wikipedia, the free Carbonate mineral

Formula

(repeating unit) Cu2CO3(OH)2

Strunz classification 5.BA.10

Crystal system Monoclinic

Crystal class Prismatic (2/m)

(same H-M symbol)

Space group mass 221.1 g/mol

Color Bright green, dark green, blackish green, commonly banded in masses; green to yellowish green in transmitted light

Crystal habit Massive, botryoidal, stalactitic, crystals are acicular to tabular prismatic

Twinning Common as contact or penetration twins on {100} and {201}. Polysynthetic twinning also present.

Cleavage Perfect on {201} fair on {010}

Fracture Subconchoidal to uneven

Mohs scale hardness 3.5–4.0

Luster Adamantine to vitreous; silky if fibrous; dull to earthy if massive

Streak light green

Diaphaneity Translucent to opaque

Specific gravity 3.6–4

Optical properties Biaxial (–)

Refractive index nα = 1.655 nβ = 1.875 nγ = 1.909

Birefringence δ = 0.254

References [1][2][3][4]

Malachite is a copper carbonate hydroxide mineral, with the formula Cu2CO3(OH)2. This opaque, green banded mineral crystallizes in the monoclinic crystal system, and most often forms botryoidal, fibrous, or stalagmitic masses, in fractures and spaces, deep underground, where the water table and hydrothermal fluids provide the means for chemical precipitation. Individual crystals are rare but do occur as slender to acicular prisms. Pseudomorphs after more tabular or blocky azurite crystals also occur.[4]

Contents [hide]

1 Etymology and history

2 Use

3 Occurrence

4 Gallery

5 See also

6 References

7 Further reading

Etymology and history[edit]

The stone\'s name derives (via Latin: molochītis, Middle French: melochite, and Middle English melochites) from Greek Μολοχίτης λίθος molochitis lithos, \"mallow-green stone\", from μολόχη molōchē, variant of μαλάχη malāchē, \"mallow\".[5] The mineral was given this name due to its resemblance to the leaves of the mallow plant.[6]

Malachite was extensively mined at the Great Orme mines in Britain 3,800 years ago using stone and bone tools. Acheological evidence indicates that mining activity ended around 600 B.C.E with up to 1,760 tonnes of copper being produced from the mined evidence indicates that the mineral has been mined and smelted to obtain copper at Timna Valley in Israel for over 3,000 years.[9] Since then, malachite has been used as both an ornamental stone and as a gemstone.

In ancient Egypt the colour green (wadj) was associated with death and the power of resurrection as well as new life and fertility. They believed that the afterlife contained an eternal paradise which resembled their lives but with no pain or suffering, and referred to this place as the ‘Field of was used as a mineral pigment in green paints from antiquity until about 1800.[11] The pigment is moderately lightfast, very sensitive to acids, and varying in color. This natural form of green pigment has been replaced by its synthetic form, verditer, among other synthetic greens.

Malachite is also used for decorative purposes, such as in the Malachite Room in the Hermitage, which features a huge malachite vase, and the Malachite Room in Castillo de Chapultepec in Mexico City. \"The Tazza\", a large malachite vase, one of the largest pieces of malachite in North America and a gift from Tsar Nicholas II, stands as the focal point in the center of the room of Linda Hall often results from the weathering of copper ores, and is often found together with azurite (Cu3(CO3)2(OH)2), goethite, and calcite. Except for its vibrant green color, the properties of malachite are similar to those of azurite and aggregates of the two minerals occur frequently. Malachite is more common than azurite and is typically associated with copper deposits around limestones, the source of the carbonate.

Large quantities of malachite have been mined in the Urals, Russia. Ural malachite is not being mined at present,[12] but G.N Vertushkova reports the possible discovery of new deposits of malachite in the Urals.[13] It is found worldwide including in the Democratic Republic of the Congo; Gabon; Zambia; Tsumeb, Namibia; Mexico; Broken Hill, New South Wales; Lyon, France; Timna Valley, Israel; and the Southwestern United States, most notably in Arizona.[14]