Simulated Diamond Quartz Carnelian
Cubic zirconia is the most readily available, inexpensive and brilliant simulated diamond on the market today. Cubic zirconia does occur naturally in small quantities, but all of the cubic zirconia on the market is produced in a laboratory.
On the Mohs Scale, which measures the hardness of minerals, cubic zirconia is an 8.0 to 8.5. It is important to understand that hardness is not necessarily related to durability. Even though diamond is the hardest mineral (10.0 on the Mohs Scale), it can still be chipped or broken.
The only ways to tell the difference between cubic zirconia and diamond are by use of a thermal probe, by weighing the loose stone or by microscopic examination of surface features and inclusions. Cubic zirconia weighs approximately 65% more than diamond. Therefore, while a 6.25 mm round diamond weighs about 1.00 carat, the same size cubic zirconia weighs about 1.65 carats. If you know the weight of a cubic zirconia, you can figure out the diamond weight equivalent by multiplying the cubic zirconia weight by 0.6, or 60%.
Few natural diamonds on the market today are perfectly cut, and those that are cost much more than the usual diamond. Unleashing the fire, beauty and brilliance of a stone depends on its precise cut. Simulated diamonds are an excellent balance between quality, beauty and price.
Brilliance: The white light leaving a jewel, traveling upward, which is visible to the eye. Brilliance is sometimes referred to as “sparkle.”
Dispersion: Flashes of rainbow colors. Also called “fire.”
Hardness: Resistance to scratching. The higher the number, the more resistant.
Luster: The shininess of a jewel.
Toughness: Resistance to breakage.
With its uniquely mystical appearance, quartz was the “rock crystal” used in ancient times to make crystal balls. It was believed to attract energy and is still considered to be spiritual today. The gemstone was once believed to be a compact form of ice. In fact, the Greeks originally named quartz “krystallos,” meaning ice, but this terminology soon applied to any type of crystal.
Often identified by its six-sided prism shape, quartz is the most common mineral on Earth, found in nearly every environment throughout the globe. With a ranking of 7.0 on the Mohs Scale, it is a component of almost every rock type and occurs in virtually every color imaginable. Quartz has a great amount varieties that are well-known by other names, including amethyst, citrine, ametrine, rock crystal, agate, druzy, chalcedony, tigers eye and many more. There are also several varieties that hold the name “quartz,” including rose quartz, smokey quartz and rutilated quartz.
The pale pink color of quartz is known as rose quartz, the traditional gift for couples celebrating their 2nd anniversary. It is a delicate powder pink color that ranges from transparent to translucent. Transparent rose quartz is quite rare and is usually so pale that it does not show much color, except in large sizes. The translucent quality of rose quartz is much more common and is used for jewelry and carvings.
Rose quartz is probably one of the most prized stones for its mystical properties. Known as the “Heart Stone,” it is believed to have incredible powers to balance emotions and open the heart. Folklore says rose quartz can comfort brokenhearted people, bringing healing and clarity to the heart and allowing the wearer to learn to trust again. The stone is also said to foster happiness and the joy of life by bringing about contentment in love and filling one with optimism, tenderness and gentleness.
In addition to helping with romantic love, rose quartz is believed to enhance all other forms of love as well, including self-love, platonic and maternal. Its loving, nurturing energy is said to take away fears, resentment and anger and replace them with feelings of higher self-esteem and confidence. This soothing stone is also thought to balance emotions and heal emotional wounds. It is said to be especially powerful in times of stress or loss, bringing peace and calm to the wearer.
Ranging in color from nearly black to smoky brown, smoky quartz is transparent and owes its warm earthen hue to exposure to natural radioactivity. Care must be taken since its rich color will fade in the sun. Spelled either “smoky” or “smokey,” this variety of quartz is often incorrectly called “smoky topaz.”
Smoky quartz is believed to help dissolve negative energy, release stress and relieve depression. It is said to be a mild sedative with a relaxing effect that calms, soothes and restores balance and harmony. Folklore says the gem can embrace dark areas with light and love and therefore clear and cleanse the body both physically and emotionally. Smoky quartz is thought to be a warm, friendly and down-to-earth gem.
Rutilated quartz is a type of transparent rock crystal that contains long, fine needles of rutile crystals (titanium dioxide). These highly valued inclusions form a landscape of shining gold needles in an array of patterns that is breathtakingly beautiful. These golden inclusions are also known as Venus hair, Cupid’s darts and fleches d’amour (“arrows of love”). There is a less well-known variety called tourmalinated quartz that, instead of golden rutile, forms black or dark green tourmaline crystals.
Although rutilated quartz is usually cut as a cabochon, it can be a difficult stone to attain a smooth surface without pits. This is because rutile ranks a 6.0 on the Mohs Scale, while quartz ranks 7.0. The difference in hardness between the two materials, and because of the way rutile forms inside, causes problems when cutting. Each final cut piece is unique, with no two being exactly alike. Modern folklore says rutilated quartz brings forth each person's strengths, originality and ability to relate to others.
Carnelian, also spelled cornelian, ranges in color from light brownish-red, to dark reddish-orange, to deep transparent red, to bright orange. The rich color is due to the iron content and can be placed in the sun to change brown tints to red. A translucent to opaque stone, carnelian is moderately hard with a hardness of 6.5-7.0 on the Mohs Scale. This relatively inexpensive gem features great warmth and beauty and is often found as engraved cameos in antique jewelry. It is the stone of happiness and harmony in love.
Some of the oldest examples of jewelry contain carnelian and it has been featured in nearly every great civilization. The greatest myths surrounding the stone come from the Egyptian culture. At an excavation site in Ur, archaeologists uncovered the tomb of Pu-Abi, a Sumerian Queen from the third millennium, B.C. She wore a robe that contained carnelian, along with other precious and semi-precious materials. Ancient Egyptian tombs are full of examples of carnelian jewels because of the Egyptians’ belief in the stone’s power in the afterlife. According to their system, the Egyptian goddess Isis used amulets of carnelian to ensure a soul’s safe passage into the next world. The Egyptians so revered the power of the stone that it was one of three used most often in their jewelry, along with turquoise and lapis lazuli. Carnelian was a symbol of life in Pharaonic Egypt, and adorns the precious funerary pectoral of Tutankhamon.
Because carnelian has been revered for its healing, spiritual and creative qualities, Buddhists in China and India created amulets inlaid with carnelian and other semi-precious stones, ascribing to them powers of protection and utilizing them for many rituals. To this day, Buddhists in China, India and Tibet believe in the protective powers of carnelian and often follow the Egyptian practice of setting the stone with turquoise and lapis lazuli for enhanced power. The stone also appears in the Bible as one of the stones included on Aaron’s breastplate.
Carnelian has been recommended as an aid for anyone having a weak voice or being reluctant to speak. The belief was that carrying or wearing carnelian would give the person courage both to speak boldly and loudly. In fact, Napoleon is recorded to have carried one he found in Egypt and to have had faith in it as a talisman. Perhaps he followed the belief reported by Merrill: “The wearing of carnelian insured victory in all contests save those of love.”
Carnelian is a form of chalcedony, which is the microcrystalline form of quartz. Because quartz is the most common crystal on Earth, deposits of carnelian are found throughout the world. The most famous sites are in India, Brazil, Uruguay and Japan. The deposits are usually found in the lower temperature and lower pressure zones near the Earth’s surface, but the best carnelian is found in India.