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| Word |
Description |
| Radiant Cut |
A rectangular gemstone with a total of 70 facets combining the shape of an emerald cut and the sparkle of a Brilliant cut. |
| Ratchet Bezel |
A bezel that can turn clockwise or counterclockwise and clicks with a ratchet action as it rotates. |
| Rattail |
A tapering extension or thickening of a spoon handle onto the underside of the bowl. |
| Ravrio |
Antoine-Andre: (1759-1814 , maître 1777) was an prolific Parisian bronzier of the first rank, best known for his work in the Neo Classical style of the Empire. In 1786 he took over the firm of a marchand–mercier for whom he had worked, making and selling a wide range of decorative objects as well as furniture mounts. Among his specialties were clock cases which he often sold under his own name. |
| Red Gold |
Rose gold: An alloy of gold mixed with copper, which gives it a red tint. |
| Red Jasper |
An opaque, rust-red color of jasper. |
| Reeded |
Repetitive linear ornamentation of parallel or radiating lines. Also called Ribbed. |
| Refraction |
The action of changing the direction of a light wave, so the light enters the object in one direction, and leaves it in another. |
| Refractory |
A material with a high melting point, which makes it useful as a barrier between the heat source and a material that you don't want to melt, like the sides of an oven, etc.. |
| Regard Jewellery |
A kind of Acrostic jewelry, meaning jewelry where the first letter of each type of stone spells out a word. In this case, a ring or brooch set with a Ruby, Emerald, Garnet, Amethyst, Ruby, and a Diamond so that the first letter of each gemstone spelled out "Regard". |
| Relief Surface |
A kind of decoration that protrudes from the surface, like a cameo. |
| Renaissance |
The period in western Europe from the mid fifteenth century to the industrial age. The word means "rebirth" and was characterized by a radical development in the arts, medicine, politics and sciences. |
| Repousse |
Decorative technique dependent on hammering the object from the reverse side in order to raise decoration on the front, used widely with chasing that gives detail to the form raised. |
| Reproduction |
A piece made to appear as an older form with no intention to deceive the buyer as to age. |
| Reverse Crystal Jewelry |
(also called Essex crystal) A clear crystal is cut as a cabochon. A carving is made on the flat side, like an intaglio, and painted with a thin layer of mother of pearl to produce a three-dimensional effect. |
| RHD |
right hand drive |
| Rhinestone |
A faceted stone made of glass. |
| Rhodium |
A metal that is part of the platinum family but is liquid in its raw natural state not not solid like platinum. Rhodium can be applied to base metals, gold, sterling silver, or some other alloy, to give it a shiny white surface like platinum. This process was popular in the 30's and 40's, is very durable, and very expensive. |
| Rhodochrosite |
A medium to light pink opaque stone with cream or creamy-pink banding resembling a pink version of malachite. |
| Rhodolite |
A rose-red to pale violet variety of pyrope garnet. |
| Rhodonite |
A glassy, opaque, pink to rose-red mineral, often with black inclusions, composed of crystalline manganese silicate. Named after the Greek word "rhodon" meaning "rose". It is found in the former Soviet Union, the U.S., India, and Australia and is usually used as an ornamental stone. |
| Rhombohedral |
Resembling a prism with six four-sided facets. |
| Ribbed |
An undulating ridged texture, like a person's rib cage showing through the skin. |
| Ring Brooch |
A type of brooch similar to a penannular brooch, but with a complete ring to which is usually hinged a horizontal pin slightly longer than the diameter of the brooch. The point of the pin rests on the ring opposite the hinge, and the brooch is worn by pulling the fabric up inside the ring, passing the pin through it twice and then pulling the fabric tight so that it holds the pin in place. |
| Ring Guard |
A ring worn above another ring to keep it from slipping off the finger. |
| Ring Size |
A measurement of how large the ring needs to be to fit on a person's finger. The average ring size for women is 6. The average ring size for men is 10. |
| Riveting |
A method of joining two flat objects together by making a hole in each piece, then passing a pin with a large flat head, (composed of the same metal as the piece), through the holes. The pin is then pounded flat to secure it in place.
This process was used in jewelry instead of soldering when it was not advisable to use heat or when one part was intended to swivel. |
| Rivière |
A necklace composed of a single strand of gemstones of the same size and cut, usually Diamonds. |
| Rock Crystal |
Quartz: The family name for crystals composed of silica or silicon dioxide occurring in hexagonal crystals. The most common variety is colorless and transparent. This is often referred to as Clear Quartz, Rock Crystal or simply Quartz. The crystalline varieties include: amethyst, ametrine, citrine, rose quartz, and smoky quartz. There are a variety of crypto-crystalline varieties including agate (chalcedony), onyx, sardonyx, carnelian, sard, chrysoprase, bloodstone, jasper, and prase. (see individual listings). Quartz is an essential constituent of granite, forms the rocks quartzite and , and makes most of the sand of the seashore. |
| Rolo Link Chain |
A chain composed of individually linked round or oval rings resembling a standard cable chain, but with thicker rings. |
| Rondella |
A round metal disk, sometimes studded with stones, that is strung on a necklace as a spacer between beads. |
| Roof box |
fits on roof rack for extra luggage |
| Roof rails |
for attaching roof rack |
| Rope Chain |
A series of small oval-shaped links that are arranged in such a way that they make a spiral design resembling woven rope. |
| Rose Cut |
A style of diamond cutting that produces a gem with a flat base and triangular facets that rise to form a dome. This style of cut has been in use since the 16th century. |
| Rose Finish |
Jewelry finished so that it has the look of Rose Gold, but no actual gold content. |
| Rose Gold |
An alloy of gold mixed with copper, which gives it a red tint. |
| Rose Quartz |
A translucent milky pink variety of Quartz. |
| Rotating Bezel |
A bezel that can be turned to perform different timekeeping and mathematical functions. |
| Rotational Axis |
Axis Of Symmetry: (also called a rotational axis). An imaginary line around which an object can be rotated a certain number of degrees and still resemble the original shape. When two planes of symmetry intersect, they form a straight line, which is the axis of symmetry. Symmetry is one of the factors jewelers look for when grading cut stones. See Four C's. |
| Round Brilliant Cut |
Brilliant-cut: A cut gemstone having 56 to 58 facets to maximize the volume of light that is reflected from the inside and thus produce the greatest brilliance. The most common shape of brilliant cut stones are round, which is why this is type of cut is sometimes called a "round-cut", but oval, marquise, pear shape and heart shapes are not unusual. |
| Rubellite |
Tourmaline: A complex crystalline silicate occurring usually in three-sided or six-sided prisms terminated by rhombohedral or scalenohedral planes containing aluminum, boron, and other elements. Black tourmaline (schorl) is the most common variety, but there are also other varieties, as the blue (indicolite), red (rubellite), also green, brown, and white. The red and green varieties when transparent are valued as gems. Tourmaline can be found in more colors than any other stone and heat can also be applied to tourmalines to lighten, or enhance, the existing hue of the gem. |
| Ruby |
One of the four precious gemstones along with Diamonds, Emeralds and Sapphires. Ruby is a member of the corundum family whose color comes from chromium oxide in the stone. Although corundum can come in many colors, rubies are, by definition, red.
Rubies have been synthesized since at least 1890 and can only be distinguished from natural rubies by trained gemologists. Rubies are extremely hard, a 9 on the Mohs scale, second only to diamonds.
Fine rubies of good color can be more valuable than diamonds, For centuries, rubies have symbolized beauty, charity, love, passion, power, and royalty. In some countries, engagement rings are set with rubies instead of diamonds. The ruby is the birthstone for July. |
| Rutilated Quartz |
Quartz crystals with inclusions made up of rutile crystals, (which resemble fine reddish-brown, red, and sometimes yellowish hairs), embedded in the quartz. |
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