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Sapphire is a variety of the mineral corundum, an aluminium oxide. It is typically blue but fancy coloured sapphires also occur in orange, yellow, ...

Tourmalines are found in a wide range of colours, pink, green, blue, orange, yellow, brown, black, and colourless. Bi-coloured Tourmalines are also...

Garnets range from red, brownish red, purplish red, orange, yellow to green. The most valuable varieties of garnets are tsavorites and demantoid ga...

Sapphire is a variety of the mineral corundum, an aluminium oxide. It is typically blue but fancy coloured sapphires also occur in orange, yellow, ...

Spinel used to be offered as a ruby alternative but nowadays it is praised for its own special characteristics. Spinel can be red, pink, orange, pu...

Emerald’s lustre is vitreous, it rates 7.5-8 on the Mohs scale but because of their many inclusions they are not ideal for everyday jewellery, unle...

Sapphire is a variety of the mineral corundum, an aluminium oxide. It is typically blue but fancy coloured sapphires also occur in orange, yellow, ...

Sapphire is a variety of the mineral corundum, an aluminium oxide. It is typically blue but fancy coloured sapphires also occur. The variety in col...

Stone Size (mm): 10.0x8.0x5.2;Carat Weight (ct): 1.78

1.80 x 0.18 x 550 x 16mm (to fit Europa 101 (Alarm))

Opal is probably the most famous phenomenal stone displaying the unparalleled play-of-colour, a rainbow-coloured kaleidoscopic effect. The name opa...

Opal is probably the most famous phenomenal stone displaying the unparalleled play-of-colour, a rainbow-coloured kaleidoscopic effect. The name opa...

Sapphire is a variety of the mineral corundum, an aluminium oxide. It is typically blue but fancy coloured sapphires also occur. The variety in col...

Fire Opal is an unusual variety of opal gemstone from Mexico, with colours ranging from yellow to orange and orange-red. Depending on the origin of...

Sapphire is a variety of the mineral corundum, an aluminium oxide. It is typically blue but fancy coloured sapphires also occur. The variety in col...

Sapphire is a variety of the mineral corundum, an aluminium oxide. It is typically blue but fancy coloured sapphires also occur in orange, yellow, ...

Stone Size (mm): 7.12x5.90x4.99;Carat Weight (ct): 1.84

Spinel used to be offered as a ruby alternative but nowadays it is praised for its own special characteristics. Spinel can be red, pink, orange, pu...

Opal is probably the most famous phenomenal stone displaying the unparalleled play-of-colour, a rainbow-coloured kaleidoscopic effect. The name opa...

Stone Size (mm): 8.05x6.08;Carat Weight (ct): 1.85;Price Per Carat Ex. VAT (£): 600

Sapphire is a variety of the mineral corundum, an aluminium oxide. It is typically blue but fancy coloured sapphires also occur. The variety in col...

Sapphire is a variety of the mineral corundum, an aluminium oxide. It is typically blue but fancy coloured sapphires also occur. The variety in col...

Sapphire is a variety of the mineral corundum, an aluminium oxide. It is typically blue but fancy coloured sapphires also occur. The variety in col...

Spinel can be red, pink, orange, purple, violet or blue. Red and pink are caused by traces of chromium, orange and purple by chromium and iron and ...