Thursday, April 30, 2009

How and Why is Gold Alloyed ?

How and Why is Gold Alloyed ?

A number of elements are added to gold to change its properties. Here is a list of the most commonly used ones:

Silver: Acts to harden gold in conjunction with added copper. Also whitens its colour
Copper: Reddens gold and hardens it, especially when present with silver.
Zinc: Significantly lowers the melting point of alloys and consequently most solders contain zinc. Acts as a secondary whitener.
Palladium: Primary whitener of gold, especially in 18ct alloys. Raises the melting point.
Nickel: Another primary whitener which also makes for an inherently harder material. Usage more restricted due to the Nickel Directive.
Silicon: Has a de-oxidant effect during casting but can cause other problems

Thank you to Cookson http://portal.knowledgebase.net/display/2/articleDirect/index.asp?aid=232667&r=0.9207117

Monday, April 13, 2009

diamonds - origins

Diamonds have been revered throughout history. Used to embellish such items as crowns, swords and emblems as well as jewelry, they've even been part of national holidays. Queen Victoria declared the celebration of her 50th year of reign a "Diamond Jubilee." Diamonds have also been credited for having certain medicinal properties. During the middle ages, these gemstones were thought to heal illness, but only if the ailing person took the Diamond into bed to warm it up first!

Formed deep within the earth where there is intense heat and pressure, Diamonds are simply crystallized carbon. Volcanic activity of centuries ago brought these gemstones to the earth's surface, where they are found either within volcanic rock formations or washed out into rivers. India is thought to be the first river-bed source of Diamond mining, but today these gemstones are found primarily in Australia, the Soviet Union, and Africa.

No more notable it its uncut state than a plain pebble upon the beach, the true beauty of the Diamond was not revealed until the 16th century, when gemstone cutting and polishing techniques were perfected. Prior to this time, it was considered taboo to modify the original state of a Diamond. Today, the value and appeal of this stone depends largely upon how skillfully it is cut and faceted.

A gift of a Diamond is symbolic of everlasting love. There is no more convincing a promise of an enduring relationship than the brilliant gemstone that has endured in people's hearts throughout the ages.

Tuesday, April 7, 2009

April Birthstone Diamond

Monthly birthstones symbolize the month of birth according to the Gregorian Calendar.

The ancient Hindus called the Diamond "Vajra," meaning lightening, both because of the sparks of light thrown off by this gem as well as its invincible strength. The Diamond is harder than any other substance on earth.
Diamond solitaire ring
The April birthstone of the Diamond is considered to be the birthstone for Aries (The sign of the Ram) and relate to those born between March 21 - April 19. The Zodiac sign of Aries also responds to Bloodstone, Topaz, Sapphire, Jasper, and Aquamarine

To see more diamond jewels by Catherine Marche

Sunday, April 5, 2009

Aquamarine - A ring


ring_aquamarinecab
Originally uploaded by kalicat_designs
playing subleties between textured silver and a semi transparent aquamarin cabochon,this ring sits very nicely on the finger and makes a stylish statement

Thursday, April 2, 2009

Call for Applicants! Jewelry student

Call for Applicants!
WJA 2009-2010 Student Scholarship.

Deadline May 1, 2009

The Women’s Jewelry Association would like to invite you and your students to apply for the 2009-2010 Student Scholarship.
WJA is committed to empowering women in the international jewelry, watch and related businesses. We are offering Scholarships to female students enrolled in accredited fine jewelry and watch design courses in the United States of America.
Last year we gave out $25,000 in scholarships to 14 deserving students. This year will be just as exciting. This year we are awarding scholarships in two different categories:
The Designer Category (based on images of finished pieces that are designed and created by the student), and a Non-Designer Category (essay based for those studying to be a gemologist, appraiser, watch- maker, bench jeweler, or retailer).

All applications are on-line applications and can be accessed through
www.callforentry.org

If you have any questions, please e-mail Lisa Slovis Mandel at lisa@lisaslovis.com , or call WJA headquarters at 708-361-6000.

For more information on WJA please check out our website at www.womensjewelry.org

Deadline is May 1, 2009

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