Shiraz Jewelry

Shiraz Jewelry

Wednesday, 03 April 2019 12:16

Diamond Engagement Ring

Center Stone: HRD / GIA Certified Natural Diamond
Side Stones: Diamonds
Metal: 18K White Gold / Yellow Gold
Size:  Free Resizing 

These radiant diamond rings are adorned best-of-nature round diamonds. Your style say it all, whether the center diamond to be complimented by side small side diamonds, or simple plain design. Made by hand, we choose the diamonds individually by looking at them each one of them under the loop. The gold setting is strong and sturdy, that you can be sure the ring will last.

When you are in Chiang Mai and visiting our store, bring your ideas. We will make your dream engagement ring comes true.

Monday, 18 March 2019 23:00

Apatite Earring

Main Stone: Natural Apatite
Side Stones: (none)
Metal: Silver, Gold 
Size:  All size 

There is really no limit when it comes to jewelry design. This Apatite earring has unique color suitable for you who is young, modern and stylish. The gem was unearthed in Burma and carefully cut and polished into these beautiful stones. Visit our store to view more designs available. 

Note that apatite is not always available.

Sunday, 17 March 2019 10:59

Ruby Ring with Diamonds

Center Stone: Natural Ruby
Side Stones: 2 x Diamonds
Metal: 18K White Gold 
Size:  Free Resizing 

When we design this ring, we realize that a good quality Ruby is getting more difficult to find. But we love Ruby and pair it with 18K white gold they make a stunning ring. We know exactly what we put in the ring. When you are in Chiang Mai and visiting our store, we show you this ring if you will. 

It doesn't have to be diamond. Ruby can be a great center stone for an engagement ring.

Note that the ruby's weight may vary.

Tuesday, 12 March 2019 13:53


Color: Sapphire blue, amethyst, violet
Hardness: 6.5 - 7 Mohs
Specific Gravity: 3.35 
Refractive Index:  1.691 - 1.700

The name Tanzanite was introduced by the New York jewelers Tiffany & Co after an East African state called Tanzania. The name is accepted by the gems trade, but scientist refer to it as Blue Zoisite. We have to thank Tiffany & Co for disliking the name 'Blue Zoisite' which sounds pretty much like 'Blue Suicide'.

Where do we get Tanzanite gems
Obviously in Tanzania we can see the mines operating to get tanzanite gems. Nowhere else. However, the government of Tanzania banned the export of rough stones weighing more than one gram. Most likely you will see the fine, polished tanzanite gems when you visit your local gems store.

Heat treatment
Most (if not all) tanzanites used in jewelry industry are heat treated. The temperature is usually between 730-390°C for 30 minutes, and the stones should not have any cracks or bubbles, as they could shatter or the cracks/bubble could increase in size during furnace heating. (Ref: Wikipedia)

Other treatment
Recently, coated tanzanites were discovered and tested by the AGTA and AGL laboratories. A thin layer containing cobalt had been applied to improve the color. It was noted that "coatings in particular are not considered permanent", and in the United States are required to be disclosed at the point of sale.


Monday, 11 March 2019 23:47


Color: Colorless, yellow, red-brown, light blue, pinky red, pale green
Hardness: 8 Mohs
Specific Gravity: 3.35 - 3.56
Refractive Index:  1.610 - 1.638

In the past all yellow and brown gemstones were called "topaz". With advancement of technology we can happily distinct topaz from the less valuable gemstones such as citrine. A variety of impurities and treatments may make topaz wine red, pale gray, reddish-orange, pale green, or pink (rare), and opaque to transparent.

Important Topaz deposits in the world
Today's most important mines are located in Brazil, Sri Lanka, Burma, and Russia. Some clear topaz crystals from Brazil can reach boulder size and weight hundreds of pounds.

Most desirable Topaz color is pink and orange
Colored topaz are rarely vivid. The most common color is yellow with a red tint. The most valuable is pink. Orange topaz also known as precious topaz. Some topaz can fade on exposure to sunlight.

Topaz must be carefully handled
Although topaz is very hard, they must must be treated with greater care than some other gemstone of similar hardness (such as sapphire, ruby) because of a weakness of atomic bonding in different planes. This gives topaz a tendency to fracture along such a plane if struck with sufficient force. An experienced stone setting would have a good knowledge on how to set topaz into jewelry.


Thursday, 28 February 2019 23:07


Color: Blue, colorless, pink, orange, yellow, green, purple, black
Hardness: 9 Mohs
Specific Gravity: 3.99 - 4.00
Refractive Index:  1.766 - 1.774

Sapphire is a precious gemstone which is typically blue, but natural 'fancy' sapphires also occur in yellow, purple, orange, and green colors. They occur also in gray and black, and can be colorless.

Sapphires are hard stone at 9 Mohs, making them perfectly suitable for rings, engagement rings, earrings, pendants, or any other jewelries used everyday.


If you can see the tiny lines in this sapphire means the stone is natural and real. Some will dislike it considering...

Posted by Shiraz Jewelry on Sunday, March 31, 2019


Heat Treatment
It is common practice to heat natural sapphire to improve or enhance color. Evidences shown that the practice goes back at least to Roman times. Now, heat treatment often accompanied by beryllium under very high heat (just below the melting point of sapphire).

Synthetic Sapphire
Be aware when you found a sapphire gemstone that is very, very, cheap. The saying, 'if it is too good to be true, then probably it is not true" applies here. They are typically very clean without any inclusions. Visit only your trusted store to ensure you get genuine sapphire. 

Thursday, 28 February 2019 22:52


Color: Red, pink, violet, yellow, orange, blue, dark green, black
Hardness: 8 Mohs
Specific Gravity: 3.58 - 3.61
Refractive Index:  1.712 - 1.736

Spinel is a fascinating gem that occurs in a wide range of colors, such as carmine-red, blood-red (or 'ruby-spinel'), brownish-red, rose-red, orange, blue, violet-blue, dark blue, purple, greenish, and black. 

Large fine spinels are great treasures, yet few people know of their existence. That is because spinel sometimes associated with ruby and sapphire. The hardness of 8 on the Mohs scale makes spinels durable gems, suitable for daily wear jewelry.

Where are spinels coming from?
Main deposits in Burma (Myanmar) and in Sri Lanka. There are deposits in Thailand too, although not too large. 

Should you be worried of synthetic spinels when buying natural spinel?
Yes. Synthetic spinels are commonly seen in class rings and inexpensive birthstone jewelry. Synthetic spinels have been on the market since 1920s. They imitate natural spinel, and also many other gems. 

But since natural spinels are very hard, lovely, and durable, spinels should be more popular that they are now - the current neglect is due to a lack of exposure to the public by the jewelry trade. This is your chance  to get a real, natural spinel when you visit Chiang Mai, at a price that is a bargain.

Some spinel gemstone from Shiraz Jewelry in Chiang Mai.

Thursday, 28 February 2019 01:04


Color: Light green, yellow green, dark green
Hardness: 7.5 - 8 Mohs
Specific Gravity: 2.67 - 2.78
Refractive Index:  1.576 - 1.582

Emerald derived its name from Smaragdos which means 'green stone'.Its green is incomparable, and is therefore called 'emerald green'.

Only the finest qualities are transparent. Often clouded by inclusions (liquid or gas bubbles, cracks, and crystals). These are not necessarily classified as faults, but are evidences as to the genuineness of the stone as compared with synthetic and other imitations. Because most emeralds are highly included, their toughness (resistance to breakage) is classified as generally poor.

Most emeralds are oiled in order to fill in cracks so that clarity and stability are improved. The use of oil is traditional and largely accepted by the gem trade.

Thursday, 28 February 2019 00:19


Color: Colorless, yellow, brown, green, blue, reddish, black
Hardness: 10 Mohs
Specific Gravity: 3.47 - 3.55
Refractive Index:  2.417 - 2.419

In simple word, diamond is carbon. A solid form of carbon with the highest hardness of any natural material on earth. Most natural diamonds are between 1 billion and 3.5 billion years. But only 20% of all diamonds can be used for jewelry, the remaining 80% are used in industry.

How valuable is my diamond?
You'd probably have heard about "4 Cs", they are: color, clarity, cut, and carat (weight). The value of your diamond is measured against these Cs.  


The Gemological Institute of America (GIA), has a system of color grading using letters starting at D. The highest quality color grades are D, E, and F.

A clarity grading system also has been devised by GIA. They are: Flawless (F), Very Very Slightly Imperfect (VVSI), Very Slightly Imperfect (VSI), Slightly Imperfect (SI), and Imperfect (I).

Thursday, 28 February 2019 00:05


Color: Violet, pale red-violet
Hardness: 7 Mohs
Specific Gravity: 2.63 - 2.65
Refractive Index:  1.544 - 1.553

Amethyst is the birthstone of February. It is the most highly valued stone in the quartz group. Amethyst is often associated with bringing luck, ensures constancy, and stability.

You will most probably recognize amethyst from its beautiful purple color. But the gemstone color actually can range from a pale red violet to a deep purple that looks like blue or red. Some amethyst may lose some color in daylight.

Amethyst can be found in every corner of our earth. As mentioned earlier, it is composed of quartz, which is the second most abundant material in the earth's crust. While they can be found anywhere, the most important deposits are in Brazil, Uruguay and the Malagasy Republic.

How to Buy Amethyst
When looking to purchase amethyst, here are some suggested steps:

First, visit a jeweler who is trusted and reputable to ensure that you get the best information about the gemstone.

Second, check the color. A bright deep purple color is most desirable. Avoid white stripes or layers of color, brownish or rust colored tints. Too deep a purple will make the stone look black in certain light condition.

Third, look at the clarity. Visible inclusions will reduce the value of the amethyst.

Since amethyst is relatively abundant, the price usually is inexpensive. Visit our store at 170 Thapae Road, Chiang Mai to view some beautiful and top quality amethysts.

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