Nata Heng Schluessel, GG logo Roland Schluessel, FGA


7 At a depth of 2000 feet inside the open pit of the Cullinan Diamond mine,South-Africa 2
Diamonds crystallize far below the Earth's surface. The dynamism of our Planet brings them to the surface. At a depth of 2000 feet inside the open pit of the Cullinan Diamond mine, South-Africa. 300 ct. octahedral diamond crystal from South-Africa.



PILLAR & STONE INTERNATIONAL is the distributor for the “FLORINA” jewelry collection.


The FLORINA Collection is a jewelry line with an elegant contemporary design which reflects the creativity of the traditional Italian jewelry industry and the “refreshing classics” that Pillar & Stone International offers to its customers. Diamond pave, micro pave and Diamond lines are the main style tendencies of the attractive FLORINA Collection.

An excellent product with a highly attractive price: All products are manufactured in 18K gold and are precisely set with fine cut diamonds in G-H color and VS-SI clarity. Additionally, we also carry styles with color gemstones, mainly Rubies, Blue Sapphires and Fancy Color Sapphires.

The quality of the workmanship: Besides the quality control at the manufacturing site, the ultimate quality check is made in our California office.

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For further information, please contact us



Colorless to yellowish (D to Z), to brownish or greenish.
Yellow, brown, orange, pink to brownish, yellowish green to olive green, grayish blue to blue, grey.
Black Diamonds do not have a black body color but owe their color to dark inclusions.

The most valuable colorless diamonds do not show any yellowish, brownish, greenish or grayish tone. Fancy color Diamonds with a brownish or grayish tone are less desirable than pure and intense colors.


Fluorescence = Colorless to yellowish Diamonds can be inert or show a blue, yellow, orange or green fluorescence. (Fluorescence plays a role in the pricing of cut diamonds over 0.50 ct.)
Dichroism = None.
Transparency = Transparent. (This feature is of great importance and does not necessarily fall into the “clarity grading”. A lack of transparency can result from invisible micro-inclusions or from a poor crystal quality.)
Brilliancy = Extremely High.
Clarity = Gem-quality Diamonds are expected to be “eye-clean” (= F/IF to SI2).
Phenomena = none.


Hardness = 10 (= Hardest known material on Earth).
Toughness = Exceptional and good in cleavage directions.
Cleavage = Perfect in 4 directions. Caution: this is the primary reason why faceted Diamonds can be damaged.
Refractive Index = 2.417
Specific Gravity = 3.52


Ultrasonic and Steamer = Usually safe, unless stone contains feathers.
Warm soapy water = Safe.


Reaction to heat = Begins to vaporize in an oxygen-rich atmosphere at 690˚C to 875˚C.


South Africa, Russia, Canada, Botswana, Namibia, Australia. Also Brazil, Zaire, Angola, Sierra Leone and China. Historically important: India.


High temperature and high pressure treatment to improve color of yellowish and brownish Diamonds or to produce fancy colors (yellow, orange, pink, blue).
Change of color through irradiation in order to produce fancy color Diamonds.
Heat treatment to produce black Diamonds.
Alter inclusions through laser drilling and bleaching.
Filling cracks on Diamonds with surface reaching fissures and cracks.


Artificial Cubic Zirconia (CZ) is the most common Diamond imitation.
Synthetic Diamond is marketed in many colors.
Dozens of artificial imitations have been produced: YAG, GGG, Strontium Titanate, Synthetic Rutile, Synthetic Corundum.
Colorless Zircon, Corundum and green Demantoid Garnet are also used as Diamond imitations.

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