Safe Keeping Receipt (SKR)
This revolutionary trading tool is unique to HKADE. An SKR is an electronic report assigned to every lab-verified diamond stored with us. It acts as proof of ownership and verified authenticity, and allows for digital diamond trading without the hassles of physical settlement – making it easy to trade in diamonds as liquid assets.
Type of seller
Individual – An Individual Seller is an individual looking to sell diamonds they have on hand through our global marketplace.
Corporate – A Corporate Seller is a registered business that sells diamonds through our global marketplace. They may or may not also operate through other channels (retail store, online store, etc.).
On-shelf Items are items that have been verified by us and stored at our secure facilities are ready for immediate purchase. The delivery and processing times for these items are often shorter.
Await-transit Items are items that are not stored at our facilities and have not yet been verified by our labs. The delivery and processing times for these items are typically longer than those of On-shelf Items.
Type of Purchase
Single – this is a transaction that involves a single item listed on our global marketplace.
Bundled – this is a transaction that involves multiple items listed on our global marketplace. Sellers often bundle multiple items together at a discount. In some instances, items in a bundle can be purchased on its own as a single purchase.
Naturally occurring inclusions and blemishes can affect the overall beauty and value of a diamond. Clarity measures the occurrence of these inclusions and blemishes – graded from Flawless to Included. The closer a diamond is to being Flawless, the higher its price. Find out more about the 4Cs – Clarity
The cut of a diamond does more than determine its aesthetic shape. It also determines how effectively the diamond reflects light. A properly cut diamond will appear more brilliant and fiery, while a poorly cut one can appear dark and lifeless regardless of its colour or clarity. A well-cut diamond also appears larger than others of the same carat weight. Find out more about the 4Cs – Cut
Polish refers to smoothness of each facet of a finished diamond. A perfectly smooth surface allows light to reflect off the surface, as well as enter and exit the diamond without disruption. The GIA measures polish in 5 grades: Excellent, Very Good, Good, Fair and Poor.
Symmetry refers to the precision with which the facets of a diamond align and intersect. Poor symmetry can misdirect light, sending it off at wrong angles and reducing the diamond's brilliance. Misshapen or misaligned facets, off-centred culets and tables, and wavy girdles can all negatively affect symmetry.
The culet is the small area at the bottom of a diamond's pavilion (the “tip” at the bottom). The culet can be a point or a small facet that is parallel to the table (the top facet of a diamond).
The girdle is the outer edge of the diamond, where the crown (top) meets the pavilion (bottom). A girdle may be faceted, bruted (a continuous unpolished surface), or polished (a continuous polished surface). The girdle may vary in thickness according to the cut.
Fluorescence refers to a diamond's tendency to give off a coloured glow (usually blue) under ultraviolet light. About 30% of diamonds fluoresce to varying degrees. In the past, fluorescence can affect price as it was sometimes perceived as a flaw. Generally, fluorescence should not be a major factor in pricing because its effects are very minor and perceptible only to a gemologist using a special UV light source.
The table is the top flat surface (top facet) of a diamond. The table % is calculated by dividing the width of the table facet by the width of the diamond. For example, if the table facet is 3.5 mm and the diamond’s width is 5 mm, its table % is 70. The ideal table % for a round diamond should be between 53% and 64%.
Depth is the distance between the culet and the table of a diamond, expressed in millimetres. The depth % is calculated by dividing the depth by the width of the diamond. For example, a diamond that is 3mm in depth and 4.5 mm in width has a depth % of 66.7. The ideal depth percentage for a round diamond should be between 58% and 64%.
Diamond measurements are expressed in millimetres, in the order of length, width and depth. Length is measured from table to culet. In round and square cut diamonds, width and depth are nearly identical, whereas in fancy shapes, the length is usually longer than width (except in heart cuts, where the width is measured from lobe to lobe and can sometimes have a width that is larger than length).
Length/Width Ration (L/W) ratio is calculated by dividing length (usually the longer measure) by its width. For example, a diamond that is 5mm in length and 3.5mm in width will have a L/W ratio of 1.43. A perfectly round or square diamond will have a L/W ratio of 1 but in reality, this number is usually very slightly off due to minor imperfections in the cutting.
Crown Angle is the measurement of the angle between the table and the crown’s facets. The right crown angle (i.e. one that complements the pavilion angle) will optimally reflect light into the pavilion in such a way that the light will then be reflected back through the crown – resulting in maximum brilliance. The ideal crown angle for a round diamond should be between 34% and 34.9%.
crown height %
The part of the diamond above the girdle is called the crown. The crown height is measured vertically and can be expressed in millimetres or as a percentage of the average diameter. For example, if a Round Cut diamond is 5mm in diameter and its crown height is 0.75mm, then the crown height percentage is 15%.
Pavilion Angle is the measurement of the angle between the table and the pavilion’s facets. The right pavilion angle (i.e. one that complements the crown angle) will optimally reflect light back through the crown – resulting in maximum brilliance.
Pavilion Depth %
The part of the diamond below the girdle is called the pavilion. The pavilion height is measured vertically and can be expressed in millimetres or as a percentage of the average diameter. For example, if a Round Cut diamond is 5mm in diameter and its pavilion height is 2.1mm, then the crown height percentage is 42%. The ideal pavilion depth % for a round diamond should be between 42.8% and 43.2%.
star length %
The Star Length % is calculated by taking the horizontally projected distance from the point of the star facet to the edge of the table, and dividing it with the distance between the table edge and the girdle edge. This is averaged for all 8 star facets and rounded to the nearest five percent.
lower half %
The Lower-Half Length % is calculated by taking the horizontally projected distance from the point where two pavilion mains meet to the closest edge of the girdle, and dividing it with the distance between the girdle edge and the centre of the culet. This is averaged for all 8 lower-half facets and rounded to the nearest five percent.
An inscription is a mark that has been laser-engraved on a facet of a diamond. This could be a cutter’s trademark, an identification number or a personalised inscription requested by a customer.
By leaving comments, buyers and sellers can give thoughtful feedback about transactions that they have experienced, whether positive or negative. In addition to star ratings, comments are a useful a way to judge a buyer or seller’s reputation.
Sellers can offer a refund period for items they sell. By offering a refund period, sellers can give buyers a greater sense of confidence. The default refund period on our global marketplace is 7 days. If an item is refundable, the seller will receive the payment at least 7 days later than non-refundable items if no refund request is made.
hearts & arrows
This cut closely follows the Excellent Cut proportions of a round brilliant diamond. When viewed from above, a pattern of arrows can be seen in a Hearts and Arrows diamond. When viewed from the pavilion (the bottom), 8 hearts can be seen. These patterns can be seen in genuine Hearts and Arrows diamonds at a glance – an indication of the cut’s perfect optical symmetry.
type of report
GIA – The Gemological Institute of America is a leading authority on diamonds, gems and pearls. Since 1931, the GIA has been a leading source of knowledge, standards, and education in gems and jewellery. Diamond certification by the GIA is globally recognised and trusted.
AGS/AGSL – The American Gem Society / American Gem Society Laboratories is a premier organisation of industry professionals specialising in all aspects relating to diamonds and gems – including education and setting of standards. Diamond certification by the AGS/AGSL is globally recognised and trusted.
A diamond’s index price is the current average price of diamonds of comparable size and quality. We consolidate data from recent online transactions and asking prices sourced from independent channels – creating a reliable and transparent price index so you can make sound trading decisions.
This indicates the amount of funds that a seller will receive, after transaction has been completed and HKADE commission has been deducted.
HKADL Verification – Every diamond listed on our global marketplace has been verified by our experts in our own lab. This process includes checks for authenticity as well as verification that the listed diamond matches its certification from the GIA or AGS.
GIA Verification – Diamonds that have been verified by the GIA comes with a verification letter, which confirms or rejects its authenticity of the stone described in the original GIA report. This service entails a fee and will normally require between 2-3 weeks.
allow single purchase
If a seller wishes to offer the option of buying individual items in a Bundled Listing, the listing will be marked as Allow Single Purchase.
A properly chosen password can offer greater security – especially important in high-value transactions such as those on our global marketplace. We require all passwords to be at least 8 characters in length, with at least one number and one capital letter.
Role of User (for Corporate Accounts)
A single Corporate Account can be managed by multiple people in the organisation. Each person can be assigned Roles with varying functions available to them for added security.
Top Management: This Role offers the user full access to all functions, which is usually for C-suite staff or financial department.
Admin: Admin users only have access to user management functions – with no access to funding or transactional functions.