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Andradite Gemstone: Properties, Meanings, Value & More
安長石寶石:屬性、含義、價值等
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andradite garnet gemstoneThe crème de la crème of garnet species, andradite occurs in a dazzling array of hues, from deep green to fiery orange.

Andradite is a rare gemstone prized by mineral collectors and crystal enthusiasts alike.

A stone of higher thinking and self-empowerment, andradite is more than visually stunning. This gem is believed to have a powerful impact on your physical, mental, and spiritual well-being.

Curious to learn more about this rare and cherished garnet? Today, we’re exploring the history, properties, uses, and all there is to know about andradite.

andradite garnet gemstone

About Andradite Stone

Firstly, what does the name ‘andradite’ mean?

Andradite was named after Brazilian mineralogist José Bonifácio de Andrada e Silva, credited with the mineral’s discovery — but more on that later.

Since andradite is a garnet, you can use this gem as a:

Switching gears, let's take a look at the mineral traits that make andradite a unique member of the garnet family.

Andradite Specifications & Characteristics

Andradite is the final member of the ugrandite garnet series, a group of calcium-iron garnets consisting of andradite, grossular, and uvarovite garnets. This series includes some of the most valuable and prized garnets and provides clues about the history of the rock they're found in.

The andradite formula is Ca3Fe3+2(SiO4)3, representing its chemical composition of calcium, iron, silicon, and oxygen. This chemical composition gives andradite unique physical and optical properties, like its high refractive index and durability.

Here’s an overview of andradite’s mineral data:

  • Mohs hardness: 6.5 to 7.5

  • Color: Yellow, greenish-yellow to emerald-green, dark green; brown, brownish-red, brownish-yellow; gray to black; sometimes sectored

  • Crystal structure: Isometric/cubic

  • Luster: Vitreous, resinous, or near-adamantine

  • Transparency: Transparent to translucent

  • Refractive index: 1.88 to 1.91

  • Density: 3.70 to 4.10

  • Fracture: Conchoidal to uneven

  • Tenacity: Brittle

  • Streak: White

  • Treatments: Heat (to enhance color)

Types of Andradite

Although andradite is a type of garnet, it also encompasses a range of distinct varieties, each with its own characteristics:

Colophonite

A brown, red, or orange granular variety with a resinous, amber-like luster.

Demantoid

demantoid garnet andradite gemstone variety

The most sought-after andradite variety; ranges from emerald-green to green.

Melanite

melanite garnet andradite gemstone varietyImage credit: Rob Lavinsky, iRocks.com – CC-BY-SA-3.0

Curious what black andradite is called? Meet melanite, a lustrous black opaque variety.

Rainbow Garnet

andradite rainbow garnet gemstone variety

Iridescent form of andradite; the least well-known variety.

Topazolite

topazolite andradite garnet gemstone variety

Rarest andradite variety; occurs in lemon-yellow to yellowish-green similar to topaz.

Mali Garnet

mali garnet andradite gemstone variety

Mali garnets are a combination of andradite and grossular only found in Mali. These rare garnets have yellow to green coloring and some are color-changing from grayish-green to brown. They're harder and more wearable than most andradites. 

Phew! That’s a lot of andradites. Ready for history?

Andradite History

Andradite was named by American geoscientist James Dwight Dana in 1868.

As mentioned, the mineral’s moniker pays homage to its discoverer, J.B. d’Andrada e Silva, who uncovered the mineral while exploring diamond and gold mines in Minas Gerais, Brazil, in the early 19th century.

Throughout history, garnets were highly valued for their beauty and symbolism.

For instance, the ancient Greeks saw garnets as tokens of passion and devotion, while the first Anglo-Saxons adorned weaponry with these gems. Some royal figures even dropped garnets into wine glasses to ward off poison attacks.

Andradinites, in particular, have had a range of historical uses, including:

  • Jewelry and decorative ornaments

  • Refractory materials (furnace linings and high-temperature ceramics)

  • Abrasives (sandpaper and grinding wheels)

Metaphysically, what is andradite used for?

red orange andradite garnet healing stone

Andradite Healing Properties

Like other gems, including garnets, andradites make powerful healing stones for enhancing your mind, body, and soul.

Physical Healing

Physically, andradite strengthens the immune system, encourages blood stimulation, and boosts mineral assimilation.

Andradite may also promote bone health, boost energy and vitality, and support wound healing.

Emotional Healing

Many healers associate andradite with personal development and empowerment. It may inspire emotional strength, stability, and self-confidence, helping you rely less on external validation and trust your intuition.

Andradite may also be a powerful aid for overcoming feelings of victimization, addiction, or suicidal thoughts, providing support and protection during times of difficulty and transition.

Chakra Healing

You can also use andradite as a chakra stone for balancing your root chakra, located at the base of your spine.

This energy point is your hub of grounding, stability, and security. Andradite stabilizes your root chakra, improving your connection to the physical world, as well as your ability to feel safe and secure in your environment.

yellow andradite garnet gemstone faceted

Andradite Gemstone Properties

Like most gems, andradite is graded based on color, cut, clarity, and carat weight.

Color

Andradite boasts a dispersion surpassing all other garnets, rivaling even diamonds.

This gem occurs in various colors, such as green, yellowish-green, yellow, brown (most common), brownish-red, and black.

Andradite’s highest-valued hues are the emerald-like greens of demantoid (caused by the presence of chromium and iron) and black melanite (caused by titanium and iron).

Cut

Most andradite gems are faceted into different gemstone shapes, particularly the demantoid variety.

Cabochon-style andradites are less common, but you can still find them on the market.

You’ll also find rough (or uncut) andradite for sale. This is the most affordable form, though exceptional specimens can still garner high prices.

andradite garnet gemstone demantoid with horsetail inclusionsPictured above: Demantoid garnet with horsetail inclusions

Clarity

Many andradites exhibit high brilliance and demantoids can display a unique form of fire caused by "horsetail inclusions” which are asbestos fibers within their structure. This phenomenon is so prized that lapidaries often facet stones to showcase them better.

Andradites have a Type II colored gemstone clarity grade. They may also receive a more specific clarity grade ranging from "eye-clean," meaning there are no visible inclusions or blemishes visible to the naked eye, to "included," meaning there are visible flaws that may affect the stone's transparency or overall appearance.

Visibly-included andradite may be less desirable or valuable than gems that aren’t, particularly if the inclusions affect the stone's transparency or overall appearance. Some, like horsetail inclusions, can increase the stone's value and desirability, as they’re considered rare.

Carat Weight

The typical size range for andradite varies according to its variety and locality.

Demantoids, for example, range from less than 0.1 carats up to several carats or more, with larger stones being rare.

Melanite, however, is typically larger, ranging from a few carats up to several hundred carats in size.

Generally, larger andradites are rarer and more valuable than smaller ones, all other factors being equal.

Moving on, what type of rock is andradite?

andradite garnet rough crystal specimen

Andradite Formation & Sources

Andradite typically forms in high-temperature, high-pressure environments, like metamorphic or igneous rocks.

What is the temperature of andradite? This mineral requires around 1292°-2372°F (700°-1300°C) and pressures of several kilobars to form.

However, andradite can form via several processes, including contact metamorphism, regional metamorphism, and hydrothermal alteration.

Geographically, where is andradite found?

Mining Locations

The semi-precious gemstone is a prominent mineral found in several areas throughout Pennsylvania, USA.

The largest, most well-known deposit of andradite is in Cornwall, Pennsylvania, where the mineral is associated with magnetite and hematite.

Other notable localities include:

  • Afghanistan

  • Australia

  • Canada

  • China

  • Democratic Republic of the Congo

  • Greenland

  • Iran

  • Italy

  • Japan

  • Mali

  • Mexico

  • Namibia

  • Norway

  • Pakistan

  • Peru

  • Russia

  • South Africa

  • South Korea

  • Sri Lanka

  • Sweden

  • Turkey

  • Uganda

  • Yemen

  • Zimbabwe

andradite demantoid garnet gemstone ring with pink diamonds

Andradite Price & Value

Andradites are generally considered to be among the rarer and more valuable types of garnets. Here’s an overview of what you can expect price-wise:

  • Faceted andradite: Around $100 per carat for lower quality stones up to several thousand dollars per carat for top-quality gems with exceptional color, clarity, and cut.

  • Cabochons: Around $10 per carat for lower-quality stones, up to a few hundred dollars per carat for top-quality cabochons.

  • Rough andradite: Typically sold by weight rather than by carat, with prices ranging from a few dollars per gram for lower-quality stones up to several hundred dollars per gram for top-quality specimens.

  • Jewelry: From a few hundred dollars up to several thousand dollars or more, depending on the materials used and stone quality.

Caring for your gemstones will preserve their natural beauty for a lifetime of enjoyment.

Andradite Care and Maintenance

To clean your andradite, use warm water, mild detergent, and a soft brush. Gently scrub away grime and dry with a soft cloth. Then, store your gem in a cool, dry place away from harder gems and materials.

Keep your andradite away from:

  • Ultrasonic cleaners or steamers

  • High heat and extreme temperature changes

  • Prolonged UV exposure

  • Harsh chemicals and detergents

Since some andradites are more susceptible to scratching, opt for jewelry with protective settings and avoid wearing them during rigorous activity.

Stick to these guidelines, and your andradite will sparkle and shine for years to come.

orange andradite garnet gemstone faceted

Spark Your Inner Fire with Andradite!

Andradite truly lives up to its reputation as a unique and cherished garnet. Its dazzling color variations and impressive optical properties perfectly parallel its metaphysical superpower. This rare, dynamic gem is a true feast for the senses, captivating both the eye and the soul.

Ready to experience the transformative allure of andradite for yourself?

Buy andradite gemstones today!

石榴石品種中的奶油色和榴石以一系列令人眼花繚亂的色調出現,從深綠色到火橙色。

Andradite 是一種稀有寶石,深受礦物收藏家和水晶愛好者的喜愛。

一顆具有更高思考和自我賦權的石頭,andradite 不僅僅是視覺上的驚艷。人們相信這種寶石對您的身體、心理和精神健康有強大的影響。

想了解更多關於這種稀有且珍貴的石榴石的信息嗎?今天,我們正在探索關於 andradite 的歷史、特性、用途以及所有相關知識。

安榴石石榴石寶石

關於安長石

首先,“andradite”這個名字是什麼意思?

Andradite 以巴西礦物學家 José Bonifácio de Andrada e Silva 的名字命名,他因該礦物的發現而受到讚譽 - 但稍後會詳細介紹。

由於 andradite 是石榴石,您可以將此寶石用作:

換檔,讓我們來看看使安德拉石成為石榴石家族中獨一無二的成員的礦物特性。

安長石規格和特性

鈣鐵榴石是烏榴石石榴石系列的最後一員,該系列是一組鈣鐵石榴石,由鈣鐵榴石、鈣鋁榴石鈣鐵榴石組成。該系列包括一些最有價值和最珍貴的柘榴石,並提供有關發現它們的岩石歷史的線索。

安榴石分子式為Ca3Fe3+2(SiO4)3,代表其化學成分為鈣、鐵、矽、氧。這種化學成分賦予鈣鐵礦獨特的物理和光學特性,如高折射率和耐久性。

以下是安長石礦物數據的概述:

  • 莫氏硬度:6.5 至 7.5

  • 顏色:黃色、黃綠色至翠綠色、深綠色;棕色、棕紅色、棕黃色;灰色到黑色;有時扇形

  • 晶體結構: 等距/立方

  • 光澤: 玻璃光澤、樹脂光澤或近金剛光澤

  • 透明度: 透明到半透明

  • 折射率:1.88 至 1.91

  • 密度:3.70 至 4.10

  • 斷口: 貝殼狀到不均勻

  • 韌性:脆

  • 條紋:白色

  • 治療方法:加熱(增強顏色)

安長石的種類

雖然鈣鐵榴石是石榴石的一種,但它也包含一系列不同的品種,每個品種都有自己的特點:

樹脂石

一種棕色、紅色或橙色顆粒狀品種,具有類似樹脂的琥珀色光澤。

濃綠榴石

濃綠榴石和榴石寶石品種

最搶手的andradite品種;範圍從翡翠綠到綠色。

黑色素

黑榴石和榴石寶石品種圖片來源:Rob Lavinsky, iRocks.com – CC-BY-SA-3.0

想知道黑色鈣鐵榴石叫什麼嗎?遇見黑色素,一種有光澤的黑色不透明品種。

彩虹石榴石

虹彩形式的安榴石;最不知名的品種。

黃玉石

托帕石和榴石石榴石寶石品種

最稀有的品種;呈檸檬黃色至黃綠色,類似於托帕石

馬里石榴石

馬里石榴石安榴石寶石品種

馬里石榴石是僅在馬里發現的鈣鐵榴石和鈣鋁榴石的組合。這些稀有石榴石呈黃色到綠色,有些顏色會從灰綠色變為棕色。它們比大多數和輻射材料更硬、更耐磨。

呸!那是很多andradites。準備好迎接歷史了嗎?

安長石歷史

Andradite 於 1868 年由美國地球科學家 James Dwight Dana 命名。

如前所述,該礦物的綽號是為了向其發現者 JB d'Andradada e Silva 致敬,他於 19 世紀初在巴西米納斯吉拉斯州勘探鑽石和金礦時發現了該礦物。

縱觀歷史,石榴石因其美麗和象徵意義而受到高度重視。

例如,古希臘人將石榴石視為激情和奉獻的象徵,而第一批盎格魯撒克遜人則用這些寶石裝飾武器。一些皇室人物甚至將石榴石放入酒杯中以抵禦毒藥襲擊。

尤其是Andradinites,具有一系列歷史用途,包括:

  • 首飾及裝飾品

  • 耐火材料(爐襯和高溫陶瓷)

  • 磨料( 砂紙和砂輪)

形而上學,andradite 是做什麼用的?

紅橙色安榴石石榴石治療石

安長石治療特性

與其他寶石(包括石榴石)和輻射石一樣,它們是強大的治療寶石,可以增強您的思想、身體和靈魂。

身體治療

在身體上,andradite 可以增強免疫系統,促進血液刺激,並促進礦物質的吸收。

Andradite 還可以促進骨骼健康,增強能量和活力,並支持傷口癒合。

情緒療愈

許多治療師將個人發展和賦權聯繫在一起,並與之抗爭。它可能會激發情緒力量、穩定性和自信,幫助您減少對外部驗證的依賴並相信自己的直覺。

Andradite 也可能是克服受害、成癮或自殺念頭的強大幫助,在困難和過渡時期提供支持和保護。

脈輪療愈

您還可以使用安榴石作為脈輪石來平衡位於脊柱底部的根脈輪。

這個能量點是你的基礎、穩定和安全的中心。 Andradite 穩定您的根脈輪,改善您與物質世界的聯繫,以及您在環境中感到安全和有保障的能力。

黃色安榴石石榴石寶石刻面

安長石寶石屬性

與大多數寶石一樣,andradite 根據顏色、切工、淨度和克拉重量進行分級。

顏色

Andradite 擁有超越所有其他石榴石的分散性,甚至可以與鑽石相媲美。

這種寶石有多種顏色,例如綠色、黃綠色、黃色、棕色(最常見)、棕紅色和黑色。

Andradite 價值最高的色調是濃綠榴石(由鉻和鐵的存在引起)和黑色黑色素(由鈦和鐵引起)的祖母綠般的綠色。

大多數安榴石寶石都被刻面成不同的寶石形狀,尤其是濃榴石品種。

Cabochon風格和 radites 不太常見,但您仍然可以在市場上找到它們。

您還會發現待售的原石(或未切割)和硬質合金。這是最實惠的形式,儘管特殊的標本仍然可以獲得高價。

含馬尾狀內含物的安榴石石榴石寶石濃綠榴石上圖: 帶馬尾狀內含物的濃綠榴石

明晰

許多菱形榴石展現出很高的亮度,而濃榴石可以展現出一種獨特的火彩形式,這是由“馬尾內含物”引起的,馬尾內含物是其結構中的石棉纖維。這種現象非常珍貴,以至於寶石加工商經常將石頭刻面以更好地展示它們。

Andradites 具有 II 類有色寶石淨度等級。它們還可能獲得更具體的淨度等級,範圍從“肉眼無暇”,意思是沒有肉眼可見的內含物或瑕疵,到“內含物”,意思是存在可能影響寶石透明度或整體外觀的可見瑕疵.

明顯包含內含物和放射性長石可能不如沒有內含物的寶石受歡迎或價值低,尤其是當內含物影響寶石的透明度或整體外觀時。有些,如馬尾內含物,可以增加寶石的價值和吸引力,因為它們被認為是稀有的。

克拉重量

安榴石的典型尺寸範圍因其品種和產地而異。

例如,濃榴石的重量從不到 0.1 克拉到幾克拉或更多不等,較大的寶石很少見。

然而,黑色素通常較大,從幾克拉到幾百克拉不等。

一般而言,在所有其他因素都相同的情況下,較大的輻射隕石比較小的輻射隕石更為稀有且更有價值。

繼續,什麼類型的岩石是 andradite?

安榴石石榴石原石晶體標本

安長石的形成和來源

Andradite 通常在高溫、高壓環境中形成,如變質岩或火成岩。

安榴石的溫度是多少?這種礦物需要大約 1292°-2372°F(700°-1300°C)和幾千巴的壓力才能形成。

然而,andradite 可以通過幾個過程形成,包括接觸變質作用、區域變質作用和熱液蝕變。

在地理上,在哪裡可以找到安鐵榴石?

採礦地點

這種半寶石是在美國賓夕法尼亞州的多個地區發現的重要礦物。

最大、最著名的鈣鐵礦礦床位於賓夕法尼亞州的康沃爾,那裡的礦物與磁鐵礦赤鐵礦有關。

其他值得注意的地方包括:

  • 阿富汗

  • 澳大利亞

  • 加拿大

  • 中國

  • 剛果民主共和國

  • 格陵蘭

  • 伊朗

  • 意大利

  • 日本

  • 馬里

  • 墨西哥

  • 納米比亞

  • 挪威

  • 巴基斯坦

  • 秘魯

  • 俄羅斯

  • 南非

  • 韓國

  • 斯里蘭卡

  • 瑞典

  • 火雞

  • 烏干達

  • 也門

  • 津巴布韋

安榴石濃綠榴石石榴石寶石戒指,配粉紅色鑽石

安長石的價格和價值

Andradites 通常被認為是更稀有和更有價值的石榴石類型之一。以下是您在價格方面可以期待的概述:

  • 刻面鈣鐵榴石:質量較低的寶石每克拉約 100 美元,顏色、淨度和切工都出眾的頂級寶石每克拉可達數千美元。

  • 凸圓形寶石:低品質寶石每克拉約 10 美元,優質凸圓形寶石每克拉高達數百美元。

  • 鈣鎂石原石:通常按重量而非克拉出售,價格從低質量寶石每克幾美元到優質樣品每克數百美元不等。

  • 首飾:從幾百美元到幾千美元甚至更多,取決於所使用的材料和石材質量。

呵護您的寶石將保留其自然之美,終生享受。

安長石保養和維護

要清潔安榴石,請使用溫水、溫和的清潔劑和軟刷。輕輕擦去污垢並用軟布擦乾。然後,將您的寶石存放在陰涼、乾燥的地方,遠離較硬的寶石和材料。

讓你的 andradite 遠離:

  • 超聲波清洗機或蒸鍋

  • 高溫和極端溫度變化

  • 長時間暴露在紫外線下

  • 刺激性化學品和清潔劑

由於一些鈣鈦礦更容易被刮傷,因此請選擇具有保護設置的珠寶,並避免在劇烈活動中佩戴它們。

堅持這些指導方針,您的安拉蒂特將在未來的歲月裡熠熠生輝。

多面橙色榴石石榴石寶石

用 Andradite 點燃您的內心之火!

Andradite 真正名副其實,是一種獨特而珍貴的石榴石。其令人眼花繚亂的色彩變化和令人印象深刻的光學特性與其形而上學的超能力完美匹配。這種罕見的、充滿活力的寶石是一場真正的感官盛宴,令眼睛和靈魂著迷。

準備好親自體驗 andradite 的變革魅力了嗎?

立即購買和輻射寶石!

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