سعر فوب
أحصل على آخر سعر|
100 Minimum Order
بلد:
Somalia
نموذج رقم:
High quality opal stones & Precious stones
سعر فوب:
الموقع:
-
سعر الحد الأدنى للطلب:
-
الحد الأدني للطلب:
100
تفاصيل التغليف:
-
موعد التسليم:
14
القدرة على التوريد:
-
نوع الدفع:
-
مجموعة المنتج :
Somalia
الشخص الذي يمكن الاتصال به Mr. Dr. Mark
Formula 10, hargaisa, Shacab District
Opal is a hydrated amorphous form of silica (SiO2è·¯nH2O); its water content may range from 3 to *1% by weight, but is usually between 6 and *0%. Because of its amorphous character, it is classed as a mineraloid, unlike crystalline forms of silica, which are classed as minerals. It is deposited at a relatively low temperature and may occur in the fissures of almost any kind of rock, being most commonly found with limonite, sandstone, rhyolite, marl, and basalt.
There are two broad classes of opal: precious and common. Precious opal displays play-of-color (iridescence), common opal does not. Play-of-color is defined as "a pseudo chromatic optical effect resulting in flashes of colored light from certain minerals, as they are turned in white light. The internal structure of precious
opal causes it to diffract light, resulting in play-of-color. Depending on the conditions in which it formed, opal may be transparent, translucent, or opaque and the background color may be white, black, or nearly any color of the visual spectrum. Black opal is considered to be the rarest, whereas white, gray, and green are the most common.
بلد: | Somalia |
نموذج رقم: | High quality opal stones & Precious stones |
سعر فوب: | أحصل على آخر سعر |
الموقع: | - |
سعر الحد الأدنى للطلب: | - |
الحد الأدني للطلب: | 100 |
تفاصيل التغليف: | - |
موعد التسليم: | 14 |
القدرة على التوريد: | - |
نوع الدفع: | - |
مجموعة المنتج : | macdan |