Watch bands can be provided with an ability to dynamically adjust the fit of a watch against a wrist of a user. One or more of a variety of tensioning elements can be provided with a shape memory polymer that responds to a stimulus to adjust a fit of the band. Such stimulus can be from user or actively applied by the watch. The shape memory polymer can be a composite material that provides high durability under cyclic stretching and high speed response of shape recovering while avoiding a drastic moduli drop by shape recovering.

Disclosed is wristband and wrist wearable device, including: a wristband body portion, one end is connected to one end of a device body of a wrist wearable device, and the other end is a free end; and a memory metal portion, which is arranged on the wristband body portion and has an arc-shaped memory state in a natural state, so that the wristband body portion is naturally maintained in an arc shape. The memory metal portion comprises a strip-shaped memory metal piece including a first metal segment, a second metal segment, and a third metal segment that are sequentially connected, the first metal segment and the third metal segment extend along a length direction of the wristband body portion in parallel, the second metal segment is arranged at the free end of the wristband body portion and is provided with at least one bent portion.

Disclosed herein are coated gemstones, coatings for gemstones, methods of coating gemstones, and methods of using coatings on gemstones to avoid blemishes on gemstones. In some embodiments, diamonds are functionalized with anchor molecules that bind hydrophilic cyclodextrin molecules to confer hydrophilicity on the diamond. In some embodiments, the diamonds resist dirt and grime build-up.

A bracelet defined by an elongated band having first and second terminal end sections that collectively define a clasp and a plurality of interconnected sockets extending along the length of the band and in each of which a rigid shell is positioned. A pair of charms each having unique indicia, such as a letter, imprinted thereon can be removably and interchangeably positioned within each shell. As an example of use, multiple friends' initials can therefore be displayed with charms positioned within each or many of the plurality of sockets forming bracelet.

A bracelet defined by an elongated band having first and second terminal end sections that collectively define a clasp and a plurality of interconnected sockets extending along the length of the band and in each of which a rigid shell is positioned. A pair of charms each having unique indicia, such as a letter, imprinted thereon can be removably and interchangeably positioned within each shell. As an example of use, multiple friends' initials can therefore be displayed with charms positioned within each or many of the plurality of sockets forming bracelet.

A setting or mounting includes a ring carrying elements for setting a decorative element, this setting or mounting being arranged to be placed radially inside a hollow provided in a substrate of an item to be decorated. The setting includes a circular slot arranged to receive a ring-like element made of a shape memory alloy which can undergo a reversible transformation. The ring-like element is able to move from a retracted position in which it rests in the slot, to an open position in which the ring-like element at least partially protrudes from the slot to hold the setting in the substrate.

A setting or mounting includes a ring carrying elements for setting a decorative element, this setting or mounting being arranged to be placed radially inside a hollow provided in a substrate of an item to be decorated. The setting includes a circular slot arranged to receive a ring-like element made of a shape memory alloy which can undergo a reversible transformation. The ring-like element is able to move from a retracted position in which it rests in the slot, to an open position in which the ring-like element at least partially protrudes from the slot to hold the setting in the substrate.

A hand jewelry such as a ring or a bracelet has been presented herein. The ring or the bracelet may be obtained by performing one or more molding processes. The jewelry may include at least inner and outer components that are formed together (i.e., single molded) into a single unit. The inner component may include an elevated portion that is a circular step or portion along an inner surface of the inner component. A width of the elevated portion is less than a width of the inner surface of the inner component. The elevated portion may include one or more grooves molded therein. The jewelry may also include one or more outer caps for covering at least a portion of the outer component of the jewelry from outside.

A dynamically flexible article or device, such as a wristband, an armband, a rollable e-reader, or a belt, includes a flexible electronic component (e.g., a flexible display) and a support structure coupled to the flexible electronic component. The support structure is configured to limit bending of the flexible electronic component to a range within a bending tolerance of the flexible electronic component.

Disclosed herein are coated gemstones, coatings for gemstones, methods of coating gemstones, and methods of using coatings on gemstones to avoid blemishes on gemstones. In some embodiments, diamonds are functionalized with anchor molecules that bind hydrophilic cyclodextrin molecules to confer hydrophilicity on the diamond. In some embodiments, the diamonds resist dirt and grime build-up.