Add to Cart
Black Key Pendant with Stainless Steel Key Ring with your logo
Ceramic
A ceramic is an inorganic compound, non-metallic, solid material
comprising metal, non-metal or metalloid atoms primarily held in
ionic and covalent bonds. This article gives an overview of ceramic
materials from the point of view of materials science.
The crystallinity of ceramic materials ranges from highly oriented
to semi-crystalline, vitrified, and often completely amorphous
(e.g., glasses). Most often, fired ceramics are either vitrified or
semi-vitrified as is the case with earthenware, stoneware, and
porcelain. Varying crystallinity and electron consumption in the
ionic and covalent bonds cause most ceramic materials to be good
thermal and electrical insulators (extensively researched in
ceramic engineering). With such a large range of possible options
for the composition/structure of a ceramic (e.g. nearly all of the
elements, nearly all types of bonding, and all levels of
crystallinity), the breadth of the subject is vast, and
identifiable attributes (e.g. hardness, toughness, electrical
conductivity, etc.) are hard to specify for the group as a whole.
General properties such as high melting temperature, high hardness,
poor conductivity, high moduli of elasticity, chemical resistance
and low ductility are the norm, with known exceptions to each of
these rules (e.g. piezoelectric ceramics, glass transition
temperature, superconductive ceramics, etc.). Many composites, such
as fiberglass and carbon fiber, while containing ceramic materials,
are not considered to be part of the ceramic family.
Pearl Jewelry
A pearl is a hard glistening object produced within the soft tissue
(specifically the mantle) of a living shelled mollusk or another
animal, such as a conulariid. Just like the shell of a mollusk, a
pearl is composed of calcium carbonate (mainly aragonite or a
mixture of aragonite and calcite) in minute crystalline form, which
has been deposited in concentric layers. The ideal pearl is
perfectly round and smooth, but many other shapes, known as baroque
pearls, can occur. The finest quality natural pearls have been
highly valued as gemstones and objects of beauty for many
centuries. Because of this, pearl has become a metaphor for
something rare, fine, admirable and valuable.
The most valuable pearls occur spontaneously in the wild, but are
extremely rare. These wild pearls are referred to as natural
pearls. Cultured or farmed pearls from pearl oysters and freshwater
mussels make up the majority of those currently sold. Imitation
pearls are also widely sold in inexpensive jewelry, but the quality
of their iridescence is usually very poor and is easily
distinguished from that of genuine pearls. Pearls have been
harvested and cultivated primarily for use in jewelry, but in the
past were also used to adorn clothing. They have also been crushed
and used in cosmetics, medicines and paint formulations.
Factory
Touch Love Jewelry Co.,Ltd is an international jewelry manufacturer.We have our own factory,which has a history of nearly 10 years in designing fashion jewelry since 2000.Our factory area is about 1000-3000 square meters,with a group of experienced team,including quality inspection personnel,R&D personnel and technical staff,ect. Our factory has strong technical strength,excellent equipment and perfect management in producing all kinds of stainless steel jewelry.We can customize the deisgns according to the different needs of different customers.Until now, we have a large stock in our warehouse,with more than 30000 styles.we can guarantee all of our product is 90% in stock. we produce 50-100 new style each week. we sold excellent quality stainless steel jewelry all over the world,and earned a worldwide reputation with our good quality, competitive price and good service.