Wednesday, 21 June 2017

Roberto Coin

Founded in Vicenza in 1977, Roberto Coin was first established by its eponymous creator to produce for internationally acclaimed jewelry brands.

The Roberto Coin brand was introduced in 1996 and within six years had reached the upper echelons of the jewelry world, ranking third internationally and first in Italy.

The signature of Roberto Coin is the use of rubies and rubellite. Roberto Coin has 8 boutiques worldwide.
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Tuesday, 20 June 2017

Mahenge Umbalite

With a unique range of color, from purplish-pink to purple and orange-pink, Mahenge umbalite went from being an outcast stone to one of the most coveted garnets on the market today. Mahenge umbalite is a rare stone, featuring a unique blend of pyrope, almandine and spessartine garnets. Mahenge umbalite ranges in color from a purplish-pink to deep purple. Orange-pinks have also been found.
Compared to rhodolite garnet, its closest cousin, umbalite features less red blush, resulting in a cooler colored stone, a result of the trace amounts of spessartine.
Umbalite has excellent fire and dispersion, and with eye-clean clarity, the stone sparkles all day. With a Mohs hardness around seven to seven and a half, umbalite is ideal for daily wear jewelry. Round and oval shapes are the most popular for faceting.

Mahenge umbalite is not treated in any way.
Discovered in late 2015, Mahenge Umbalite is from deposits near Mahenge in the Ulanga District of Tanzania’s Morogoro Region. While Umbalite was first unearthed in 1978, mining of this rare gemstone has been very irregular since its discovery. Due to Umbalite’s rarity, they are highly prized by gem collectors.

Monday, 19 June 2017

1stdibs.com - Brooches


Cartier Paris Turquoise Amethyst Diamond Gold Bird Brooch $42,750.96CAD
1stdibs.com connects the world's best dealers, finest shops and most important galleries with the world's collectors, designers and curators ... and folks like you.

Tiffany Coral Turquoise Diamond Gold Brooch $14,898 CAD

Pink Sapphire Pink Topaz Rose Gold Butterfly  $5,052.39 CAD

1960s Harry Winston Ruby Diamond Platinum Brooch

1940s Two Dimensional Retro Turquoise Ruby Sapphire Gold Fly Brooch $3,879.97CAD

Victorian Demantoid Garnet Ruby Diamond Gold Salamander Brooch $11,335.48 CAD

Rosenthal Emerald Yellow Gold Baby Bee Brooch

Van Cleef & Arpels Diamond Coral Gold Brooch/Pin $42,750.96 CAD

Tiffany Diamond Peridot Yellow Gold Fish Brooch

Piaget unveils “Sunlight Journey” collection

“Sunlight Journey” is Piaget’s fourth sun-inspired collection

Sunday, 18 June 2017

Gem Coral

Unlike most other gemstones which are mineral origin, coral is organic, formed by living organisms. It forms from branching structures created from coral polyps in tropical and subtropical ocean waters. When the coral polyps die, the hardened skeleton remains, and this is used as a gem material.
Most coral is white, but some coral can be found in several other colors, including the popular orange to red forms. This 'Red Coral', or 'Precious Coral', is the most often used for gems. Coral is an ancient gemstone, and has been used for thousands of years. Coral is naturally dull; polishing is required to bring out its glassy luster. Coral is used most often as cabochons and beads. It is also sculpted into small carvings.
Coral is very soft and brittle, and does not make a durable gemstone. (3 to 4 on the mohs scale) It is also prone to scratches and chipping. Due to environmental protection laws worldwide, production of coral for the gemstone trade is declining.

Kunzite

Kunzite is the best-known variety of the mineral spodumene. It’s named after gemologist George Frederick Kunz, who was the first to identify it as a unique variety of spodumene around 1902. Kunzite gets its color from trace amounts of manganese. California’s San Diego County is an important source of kunzite. It’s also found in Afghanistan, Brazil, and Madagascar.
It is not unusual to find kunzite in large sizes. The Smithsonian Institution houses a faceted heart-shaped kunzite that weighs 880 carats. Kunzite can be irradiated and then heat-treated to enhance its color. Both treated and natural color in kunzite can fade with exposure to heat and bright light.

Kunzite rates 6.5 to 7.0 on the mohs hardness scale, making it ideal for jewellry.