Be careful with the definition of "Investment in diamonds" - this is nothing more than a marketing story. Stones can be as rare and expensive as you like and grow in price from this, but if you need to sell such a stone, you can look for a buyer for years. But when selling diamonds, it is important to take into account their liquidity. Liquidity means how quickly a diamond can be sold and how many people are willing to buy it. The rarer and more expensive the stone, the more difficult it is to sell. It is also difficult to sell stones with low characteristics.
Which diamonds are easier to sell:
Color and clarity
Diamonds with good clarity and color are often more liquid. Diamonds with a color rating of F, G or H and clarity VS have an increased demand in the market and, therefore, can be sold faster. Diamonds with high D/E colors and clarity of FL, IF, VVS1/2 are better left for collectible stories. If we talk about colored diamonds, yellow stones are popular - they can be considered, and the rest of the colors are better left for collectors.
Size (carat)
Diamonds weighing from 1 to 5 carats usually attract more attention and interest of buyers. There are too many smaller diamonds, and larger ones are harder to sell.
Clear cuts
Diamonds with classic cuts, such as circle, emerald or couchon, are more liquid and in demand. Octagons, awnings, briolettes and other exclusives will be harder to sell.
Factors hindering the liquidity of diamonds:
1. Questionable certificates
If your diamond has some other certificate other than GIA/ HRD / AGS, then a potential buyer or broker may have questions about the authenticity of the valuation and this may become an obstacle to repurchase. Buy stones only with recognized certificates.
2. Origin
Illegally mined or conflict diamonds can create ethical and legal problems, which may affect the possibility of sale. This is becoming less relevant with the development of the Kimberley Process, but try not to buy jewelry from dubious brokers or from the hands of individuals.
3. Non-standard solutions
Some experimental cuts or exotic colors may have limited market demand and therefore may take longer to sell.
4. Inclusions and defects
Diamonds with visible defects, cracks, halftones or milkiness (BGM) can cause difficulties when selling. Always ask your broker about hidden nuances and carefully examine the stone with a magnifying glass / microscope when buying.