Main Office : Number 76 Playfair Road #03-02

                        LHK 2 Building, Singapore 367996

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                            Diamond Education

P1 - What are some of the basic things to look out for when getting a diamond?

Below is a chart explaining some basics in understanding diamond quality:
Education Chart

When getting a VS2 diamond, it is supposed to be eye-clean to about 1 carat plus. However do avoid cloud under inclusions as a collection of inclusions may become visible to the unaided eye.

Generally, the larger the diamond, the higher the clarity grade is required for the diamond to be eye-clean. This is because the threshold of inclusions determining clarity grade increases with the carat weight of the diamond. E.g. a GIA VS2 0.75 carat diamond will be eye-clean while a GIA VS2 3.02 carat diamond may not be eye-clean.

P2 - What are the instruments involved in the inspection of diamonds?

For light return, Luzure Jewelry will use primarily the ASET Scope and perhaps the Ideal-Scope.

For symmetry, Luzure Jewelry will use the Hearts & Arrows Scope This is another major misconception by the public. Hearts & Arrows scope only shows symmetry, not light return. A diamond with perfect Hearts & Arrows and can also have major light leakages too. Perfect Hearts & Arrows is not a measure of light return, but a measure of symmetry.

For inspection of physical damages, internal structure, inclusions and laser inscription on diamond’s girdle, Luzure Jewelry will use the 400x Magnifier with LCD screen, which we invite our customers to do viewing together with. With this LCD screen, customers will see what we see instead of just taking our word for it, especially when confirming the GIA laser inscription on the diamond's girdle. The 10x loupe will be used for our quick assessment of diamonds.

All diamonds must be assessed for black spots and undesirable inclusions like cavities or coloured inclusions. All diamonds must be inspected for physical damages especially at the girdle and culet area. Every diamond that Luzure Jewelry buy and sell have to pass through the electronic diamond-moissanite multi-tester tests.

Every diamond sold by Luzure Jewelry must be a genuine naturally mined diamond and must pass the Natural / HTHP / CVD Diamond tester test. Luzure Jewelry does not trade in HTHP or CVD diamonds (Lab Grown Diamonds).

Every diamond must be weighed using the carat weight scale. All diamonds must be handled with tweezers or diamond claws and not with bare fingers.

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At Luzure Jewelry, we don't just sell diamonds; We’re professional diamond traders who will inspect every aspect of the diamond for maximum quality control on behalf of the smart customer who makes their diamond purchase through us.

P3 - Diamond qualities and misconceptions

When getting colourless diamonds, choose F instead of D or E colour. This is because the colour grading for D, E and F colour are so close that I have not met a single customer who can put them into the correct order even with a side-by-side comparison. When you go higher than F colour, you’re paying for rarity instead of the colour since no untrained person will be able to make out the difference between D, E and F colour.

However colour is a matter of taste and not a measure of quality. If you need a diamond for a yellow gold jewelry, you may wish to get G, H, I, J (GIA near colourless) or K, L, M (GIA Faint Yellow) instead of D,, E or F (GIA colourless). This is because you may want a diamond colour that roughly matches the colour of the yellow gold jewelry. As a matter of preference, our business owner prefers M colour diamond for a yellow gold ring whereas some may think that O-P or Y-Z colour diamond are better choices. Ultimately, diamond colour is a matter of taste and preference (depending on the type of setting), and not a measure of quality.

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Diamond clarity, on the other hand, is a measure of quality. Customers would prefer an eye-clean diamond over one that has visible black or white inclusions or feather and cavities etc. However as a smart customer, the objective is to get an eye-clean diamond and not one of the highest clarity grading as possible. An eye-clean VS2 would cost much cheaper compared to a VVS1 (Assuming all other specs to be similar) and since both are eye-clean to the unaided eye, there in no difference to the wearer or perceiver when it comes to clarity. Nobody on the street, without your permission, is going to take a 10x loupe to look and comment on your diamond ring to say that he can see inclusions under the loupe. Therefore, as long as the diamond is eye-clean, it would be more cost-saving for the smart customer to get a VS2 clarity diamond compared to a Flawless or Internally Flawless one.

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However what is noteworthy here is that though some SI and I clarity diamonds are eye-clean, they are undesirable. This is especially so when inclusions like cavities (broken and transparent parts within the diamond, like cavings) are hidden at the girdle area. These diamonds may break into pieces during the impact of mounting or when the mounted diamond hits something accidentally. Yes diamond is the hardest element on the MOH scale (scoring 10), but hardness refers to resistance to scratching, not resistance to breaking. A diamond can be cleaved off with the right angle on impact and as traders of quality diamonds, Luzure Jewelry will not sell SI or I clarity grade diamonds, even if some of them are indeed eye-clean.

P4 - GIA Triple Excellent guarantees the best light return.

Absolutely not. The majority of GIA triple excellent diamond have major light leakages, especially directly under the table (what we call table leakages). These are the kind of GIA triple excellent you will find in shops. Without expert knowledge and assessment on your side, you are very likely to get diamonds with crap light return, only to find out when you do a side-by-side comparison with a diamond from us.

This is how table leakage looks like, notice the white parts surrounding the centre of the table on the ASET scope images below:

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The above are GIA triple excellent diamonds. Diamonds with these kinds of light leakages are common elsewhere, but not at Luzure Jewelry. As traders of quality diamonds, Luzure Jewelry will not offer these diamonds.

At Luzure Jewelry, we personally assess every single diamond using the ASET Scope and Ideal-Scope to ensure our customer are getting the best light return diamond for their money. At Luzure Jewelry, light return is graded based on the following:

A) Exceptional - We will find you this
B) Excellent - We will find you this
C) Strong - Common in shops
D) Moderate - Common in shops
E) Fair - Difficult to find even in shops
F) Poor - Difficult to find even in shops

These are the type of ASET images of the diamonds offered by Luzure Jewelry:

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Be assured of diamonds with exceptional or excellent light return when you get them from Luzure Jewelry! (Unless you specially ask for those diamonds of lower light return)

P5 - Diamonds with fluorescence are bad.

According to a publication by GIA, most consumers prefer Fluorescence in diamonds and about 10% of diamonds from medium to very strong range has this positive effect. Only less than 0.2% of diamonds with overly strong fluorescence will appear hazy.
Please see GIA's publication on fluorescence using the link below:

Click Here To Find Out More

Do not be taken in by people with inadequate knowledge when they tell you diamonds with fluorescence are bad. With understanding of this publication, you now know that those who tell you diamonds with fluorescence are bad, are actually amateurs who don't know much about diamonds. Armed with this knowledge, you're one up compared to the ordinary shopper and you're in for great deals!

P6 - Based on Luzure Jewelry's experience, what are the best colour grade and fluorescence combination?

We would say:

Colourless D, E, F - Go for none or faint fluorescence. Medium or higher fluorescence may cause your diamond to turn blue under direct sunlight. Many people actually like this effect and it is a matter of taste and preference.

Near Colourless G, H, I, J - Go for Medium or Strong Fluorescence. The blue effect under direct sunlight will make the diamond become more colourless than it actually is. The blue effect will cancel out the hint of yellow into colourless.

Faint Yellow K,L,M - Go for Strong or Very Strong Fluorescence. Basically the more yellowish the diamond, the stronger the fluorescence will need to be in order to cancel out the yellow under direct sunlight.

When buying diamonds with very strong blue fluorescence, remember to check for the blue haze effect due to overly strong fluorescence. Remember the less than 0.2% GIA mentioned in their publication? Although only less than 2 in 1000 diamonds with fluorescence will exhibit this blue haze effect, it is still good to be careful and make proper checks before buying a diamond. Having us on your side means we will make that check for you. So have a peace of mind when you make a diamond purchase from us.

P7 - All diamonds except GIA D, E and F colour are yellowish.

GIA has a very high and consistent standard for diamond colour grading. The following are GIA colour scales and their description:

D, E, F - GIA Colourless
G, H, I, J - GIA Near Colourless
K, L, M - GIA Faint Yellow

N to R - GIA Very Light Yellow
S to Z - GIA Light Yellow

Education Chart

For customers who wish to get the colourless range, we encourage them to get F colour for maximum savings. This is because the standards for colourless is so close, most untrained customers will not be able to make out GIA D, E and F colour even with a side-by-side comparison! D, E and F diamonds will match your white gold jewelry very well.

GIA near colourless range of G, H, I & J is so near colourless that most consumers may not be able to make out any hints of yellow in the diamond, especially after it has been mounted onto a ring. For near colourless diamonds with high light return, the diamond will simply appear white / colourless from the crown perspective. These diamonds are good for white gold jewelry, even though some may prefer them on yellow gold. Diamonds in this range, coupled with medium or strong blue fluorescence will appear to be colourless when under direct sunlight.

The ordinary consumer will be able to notice very faint hints of yellow in K, L and M colour diamonds. These diamonds will match yellow or rose gold jewelry well. Diamonds in this range with strong or very strong blue fluorescence will appear more colourless under direct sunlight.

Remember, your choice of colourless, near colourless or faint yellow diamonds is not a measure of quality, but a measure of taste and preference. If we’re selecting a diamond for a yellow gold ring, GIA M colour will be our best choice whereas some may think that Y-Z colour is a better choice!

Most consumers will not be able to tell any colour differences at all for diamonds that are 1 or 2 grades apart. Consumers may be able to tell the difference in colour when diamonds are more than 2 colour grades apart.

P8 - Diamonds are expensive.

Actually, they are not as expensive as the shops want you to think. Due to high mark-ups, the prices you see in shops are sky-high.

The founder of Luzure Jewelry came from being a private trader and his prices tend to side the customer. Our hearts goes to those who has paid so much more unnecessarily due to merchant mark-ups. But don't worry, we are on the consumer's side and once you've found us and received a quotation from us, you will know how much cheaper the same diamond can be when you get them from us, especially via our Direct Order Selects Program - A program dedicated for the smart consumer to get their diamonds at the lowest possible price!

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