俄罗斯卡累利阿共和国 紅寶石 2
Corundum (Variety: Ruby) Specimen
刚玉（红宝石品种）标本
English Description
Mineral: Corundum (Variety: Ruby) – Al₂O₃
Locality: Republic of Karelia, Russia
Dimensions: 3.90 cm x 3.00 cm x 2.10 cm
Description: This specimen features a well-formed ruby crystal exhibiting a deep red to purplish-red hue, characteristic of Russian rubies. The crystal’s short prismatic form is typical of corundum, and its semi-transparent to opaque nature reflects the geological conditions under which it formed. Russian rubies are primarily found in metamorphic deposits, particularly within gneiss and marble host rocks, formed under high-temperature and high-pressure conditions. Associated minerals often include amphibole, feldspar, mica, and calcite.
中文介绍
矿物：刚玉（红宝石品种） – Al₂O₃
产地：俄罗斯卡累利阿共和国
尺寸：3.90 厘米 x 3.00 厘米 x 2.10 厘米
描述：此标本展示了形态良好的红宝石晶体，呈现出俄罗斯红宝石特有的深红色至紫红色。晶体的短柱状形态是刚玉的典型特征，其半透明至不透明的性质反映了其形成的地质条件。俄罗斯红宝石主要产于变质矿床，特别是在片麻岩和大理岩中，形成于高温高压条件下。常见的伴生矿物包括角闪石、长石、云母和方解石。