The value of a topaz is largely determined by its quality. But color is also important: blue topaz, for instance, is often irradiated to deepen and improve its color.
黄水晶的价值很大程度上取决于其品质，但颜色也很重要。举例来说，蓝色的黄水晶常需放射处理以加深和改善其颜色。
Blue Topaz
原声例句
新东方优美短文背诵
英语百科
Topaz
Topaz is a silicate mineral of aluminium and fluorine with the chemical formula Al2SiO4(F,OH)2. Topaz crystallizes in the orthorhombic system, and its crystals are mostly prismatic terminated by pyramidal and other faces.
- juvenile arrythmia的意思
- juvenile arthrit的意思
- Juvenile Arthritis的意思
- juvenile arthritis,juvenile chronic arthritis,juvenile rheumatoid arthritis的意思
- juvenile assurance的意思
- Juvenile astrocytoma的意思
- juvenile atrophy的意思
- juvenile autoallergic pernicious anemia的意思
- juvenile automobile的意思
- juvenile basalt的意思
- juvenile behavior的意思
- juvenile bodies的意思
- juvenile body的意思
- juvenile calcaneal fracture的意思
- Juvenile Canavan Disease的意思
- Juvenile carcinoma of the breast的意思
- juvenile case的意思
- juvenile cataract的意思
- juvenile cell的意思
- juvenile cells的意思
- juvenile cellular fibroadenoma的意思
- Juvenile cerebellar degeneration and myoclonus的意思
- juvenile cerebral lipoidosis的意思
- Juvenile Cerebroretinal Degeneration的意思
- Juvenile Cerebroretinal Degenerations的意思