Yoan Beckaert

鉱物オークション (地球の秘宝)

二色のトルマリン結晶は、生育過程で母液の化学組成が変化することで形成され、単一の結晶内に二つの異なる色が現れます。アフガニスタンやブラジルでよく採取される these crystal?（注: 原文の英語表現を自然な日本語に）は、しばしばピンクとグリーン、またはブルーとグリーンの組み合わせで、コレクターの間で高く評価されています…

Bi-colour tourmaline crystals form when the chemical composition of the host fluid changes during growth, resulting in two distinct colours within a single crystal. Popularly sourced from Afghanistan and Brazil, these crystals—often pink and green or blue and green—are highly valued by collectors….

Bicolour tourmaline crystals are natural gemstones that display two distinct colors within a single crystal structure. This rare phenomenon occurs due to subtle environmental changes and shifts in trace chemical concentrations (such as iron, manganese, lithium, or titanium) during the crystal's slow growth process…..


From Afghanistan 


Weight : 8 grams
Size :19x12x12mm

Our expert provides this estimate to guide you when you’re bidding. It’s based on expected demand and the unique characteristics of the object, like quality, rarity, or ownership history. We can’t guarantee the object will sell, resell or be appraised for this amount.

バイカラー・トルマリン Crystals - Height: 19 mm - Width: 12 mm- 8 g - (1)

アフガニスタン, Afghanistan

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Bi-colour tourmaline crystals from Afghanistan, in crystal form, weighing 8 g and measuring 19 × 12 × 12 mm.

バイカラー・トルマリン Crystals - Height: 19 mm - Width: 12 mm- 8 g - (1)

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Bi-colour tourmaline crystals from Afghanistan, in crystal form, weighing 8 g and measuring 19 × 12 × 12 mm.

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