Larimar is a trademarked name for a rare blue, gem-quality variety of the mineral pectolite. Pectolite is normally gray in color and is actually not that rare, occurring in many locations around the world. But blue Larimar is found only in one location in the entire world - the Dominican Republic. Geologically, blue Larimar is a hydrated sodium calcium silicate with manganese. Its distinct blue color is owed to calcium being replaced by copper impurities. The composition of Larimar is often mixed with other materials such as calcite and hematite. Its color can vary from white to light-blue, and from medium sky to volcanic blue.
Mining The Stone.
This is extremely difficult.
Not only does the location of the mines make them extremely difficult to access,
but the area is subject to the hurricane season, often causing the mines to be closed for 5 months out of the year.
The stone must be mined by hand; dynamite or heavy machinery can destroy it.
So excavation is extremely labor intensive. Miners, using only hand tools, must find and follow the small veins of Larimar.
The best quality stone is often found as far as one hundred feet below the surface;
digging through all that rock by hand obviously takes quite a bit of time.
Then there is the rain. The torrential rainfall during the five-month hurricane season
often shuts down the mines. Sometimes the mines flood and the mountain can unleash devastating mudslides.
These factors contribute further to the difficulty of extraction, and limit the supply of the stone even further.
THE BEST OF THE BEST
Once the rock is excavated, it is cut and graded.
Generally, less than 10% is of jewelry quality.
We get choice picks for our polished slabs
in a variation of grades.
GRADING LARIMAR
In actuality, there is no standardized gemological grading method for Larimar.
Within the industry, several factors are typically considered in assessing the quality of the stone,
with colour and patterning being the primary ones:
1. Colour – the deeper, "volcanic" blues are considered by some to be "best".
larimar can vary with light to deep and a green deep tinge
2. Patterning – the richer, more interesting, the better.
block Blues, grens with lines of white veins, a Swimming Pool reflection is also considered lustrous
3. Luster - is it glossy? Polished stones are always prized
4. Clarity - is it free of obvious defects? (Pits, cracks, carbon deposits, etc.)
Natural gemstone with always have a varied look.
Fake Larimar is coloured porcelain and is very easily recognised.
5. Translucence - can light pass thru a portion of the stone?
Not all larimar is like this,the Best will have this but also the best can have a nice blue pool effect in the pattern.
6. Chatoyance - a luminous band with a silky luster (like that typical of cat's-eye).
Shimmer effect, not easily photoed,and can only typically be seen by the naked eye.